CA aint all bad
Ask Jim March
http://www.equalccw.com/knifelaw.html#SECTION THREE
Section 626.10 is here reproduced in it's entirety, and briefly explained in the editor's notes and text below.
Short form: K-12 schools, no knife over 2.5" is legal except for certain work-related types (kitchen stuff for the chef, etc.). At Universities and Colleges, there's a ban on FIXED BLADES bigger than 2.5" but there's no problems with large folding knives that are otherwise not switchblades under PC653k.
626.10. (a) Any person, except a duly appointed peace officer as defined in Chapter 4.5 (commencing with Section 830) of Title 3 of Part 2, a full-time paid peace officer of another state or the federal government who is carrying out official duties while in this state, a person summoned by any officer to assist in making arrests or preserving the peace while the person is actually engaged in assisting any officer, or a member of the military forces of this state or the United States who is engaged in the performance of his or her duties, who brings or possesses any dirk, dagger, ice pick, knife having a blade longer than 21/2 inches, folding knife with a blade that locks into place, a razor with an unguarded blade, a taser, or a stun gun, as defined in subdivision (a) of Section 244.5, any instrument that expels a metallic projectile such as a BB or a pellet, through the force of air pressure, CO2 pressure, or spring action, or any spot marker gun, upon the grounds of, or within, any public or private school providing instruction in kindergarten or any of grades 1 to 12, inclusive, is guilty of a public offense, punishable by imprisonment in a county jail not exceeding one year, or by imprisonment in the state prison. [Ed. Note: This is the paragraph dealing with legal carry on K-12 school grounds. Note that folding lockblades bigger than 2.5" are banned. This applies to any adult on campus; there are exceptions for work-related stuff in part "C" through "G" below.]
(b) Any person, except a duly appointed peace officer as defined in Chapter 4.5 (commencing with Section 830) of Title 3 of Part 2, a full-time paid peace officer of another state or the federal government who is carrying out official duties while in this state, a person summoned by any officer to assist in making arrests or preserving the peace while the person is actually engaged in assisting any officer, or a member of the military forces of this state or the United States who is engaged in the performance of his or her duties, who brings or possesses any dirk, dagger, ice pick, or knife having a fixed blade longer than 21/2 inches upon the grounds of, or within, any private university, the University of California, the California State University, or the California Community Colleges is guilty of a public offense, punishable by imprisonment in a county jail not exceeding one year, or by imprisonment in the state prison. [Ed. Note: This paragraph covers colleges and universities. There is still a ban on large fixed-blades, but large locking folders legal under Penal Code 653k are completely legal. This applies to any adult age 18 or over on campus, student or otherwise; there are exceptions for work-related stuff in part "C" through "G" below.]
(c) Subdivisions (a) and (b) do not apply to any person who brings or possesses a knife having a blade longer than 21/2 inches or a razor with an unguarded blade upon the grounds of, or within, a public or private school providing instruction in kindergarten or any of grades 1 to 12, inclusive, or any private university, state university, or community college at the direction of a faculty member of the private university, state university, or community college, or a certificated or classified employee of the school for use in a private university, state university, community college, or school-sponsored activity or class.
(d) Subdivisions (a) and (b) do not apply to any person who brings or possesses an ice pick, a knife having a blade longer than 21/2 inches, or a razor with an unguarded blade upon the grounds of, or within, a public or private school providing instruction in kindergarten or any of grades 1 to 12, inclusive, or any private university, state university, or community college for a lawful purpose within the scope of the person's employment.
(e) Subdivision (b) does not apply to any person who brings or possesses an ice pick or a knife having a fixed blade longer than 21/2 inches upon the grounds of, or within, any private university, state university, or community college for lawful use in or around a residence or residential facility located upon those grounds or for lawful use in food preparation or consumption.
(f) Subdivision (a) does not apply to any person who brings an instrument that expels a metallic projectile such as a BB or a pellet, through the force of air pressure, CO2 pressure, or spring action, or any spot marker gun upon the grounds of, or within, a public or private school providing instruction in kindergarten or any of grades 1 to 12, inclusive, if the person has the written permission of the school principal or his or her designee.
(g) Any certificated or classified employee or school peace officer of a public or private school providing instruction in kindergarten or any of grades 1 to 12, inclusive, may seize any of the weapons described in subdivision (a), and any certificated or classified employee or school peace officer of any private university, state university, or community college may seize any of the weapons described in subdivision (b), from the possession of any person upon the grounds of, or within, the school if he or she knows, or has reasonable cause to know, the person is prohibited from bringing or possessing the weapon upon the grounds of, or within, the school.
(h) As used in this section, "dirk" or "dagger" means a knife or other instrument with or without a handguard that is capable of ready use as a stabbing weapon that may inflict great bodily injury or death.
This is actually simpler than it looks
. Once you realize that there's ONE change between the K-12 rules in paragraph "A" and the college/university rules in "B", it all makes "sense". About as much as any weapons law does.
SECTION FOUR: LOCAL ORDINANCES AND ENFORCEMENT
This is the trickiest part.
Los Angeles and a few other SoCal cities have a town ordinance banning the carry of knives over 3". In SOME cases, it's phrased as a ban on big stuff of any sort carried openly, so that excludes fixed-blades and the open-carry of big folders, but you can still conceal (and LEAVE concealed until needed to save a life) a large folding knife.
San Francisco has an ordinance on knife carry, but it's only linked to simultaneous "illegal loitering". Clearly, this was meant as a "homeless control measure" of sorts, God only knows how old. Berkeley has a knife ordinance too.
But the reality is, local knife ordinances cannot be applied to people passing through on a major road, enforcement of all local ordinances is spotty unless you fit a "juvenile offender profile", and most cops don't even know their local knife ordinances.
If you're scrupulous about not violating state law, which I'd highly recommend, and you don't come across as a slimeball, the odds are vastly against your having problems. I've had a lot of cops see my street-carry pieces, and I've not had a confiscation or harassment yet.
ing bike? 
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Be glad the "officers" were going to use a slim jim instead of a rock. That said, you certainly have cause for complaint, however, I would consider the ramifications. Campuses are comparatively small areas, and you could find it's more trouble than it's worth. (Tickets, whether deserved or not, waiting for you to leave the campus watering hole, etc.) You can be assured that they wrote down your plate and physical description. If you go to their boss on this, they will get an a** chewing, and will have YOUR liscense plate. 