(And, often those persons are compensated for the risks they take, to include death and disability benefits for themselves and their families if the risks catch up to them.)
Those "benefits" are largely overestimated. Many first responder families that experience that loss have no other choice but to resort to charity just to get through the immediate and ridiculously costly expense of burying said first responder. Those "benefits" are under control of insurance companies, whose automatic initial response is denial of benefits regardless of the situation.
In other words, those "benefits" are no better than yours or mine, and when it comes down to it, is money really sufficient relief when you've lost such an important part of your family? I don't think so. So really, Sam, not to come off as rude, but that argument still doesn't wash.
In regards to the OP - While each individual situation and set of circumstances MUST dictate an individual's response, I firmly believe that my life was a gift from god and with it comes a responsibility to defend other lives.
"Be a good witness" I can get down with that - Attention to detail is important in any situation, but in a high threat situation it's doubly important.
"Call for help" Absolutely - I have local emergency numbers in my speed dial - what happens if there's no signal, though? I know my Sprint phone doesn't get a signal inside most Walmarts, half the grocery stores in town, the shooting ranges, and Home Depot (and ironically also doesn't get a signal in my garage, roams in my bedroom, but has full signal everywhere else in the house).
"Get your family out of harm's way" Of course! This is step 1 - get down, get out. Doesn't mean I'm failing them if I cover their backs while they make their way to an exit.
Helping your family to escape alive and unharmed IS NOT mutually exclusive with taking action to end an active shooter threat.
Assuming the active shooter is actually one of those deranged criminal types, or false flag operators, or just some nut with a gun, and assuming I find myself in a position to do something about it, you're damn right I'm going to do something about it - I don't know how I'd live with myself if I allowed innocent men, women and children to be harmed because I failed to act when I had the chance.
On the other side of that coin, if I'm not in a position to do anything towards ending the threat, you can bet I'd be one of the guys helping get people to safety.
Personally, though, I find the "Be a good witness, call the cops and get out" policies of non-intervention to be heartless, uncaring, and one of the major problems with this society.
Part of the reason I say the things I say regarding this is the decision in the case of Warren v. District of Columbia where the decision states, in part it is a "fundamental principle of American law that a government and its agents are under no general duty to provide public services, such as police protection, to any individual citizen."
There are several other cases that say much the same thing.
Basically this means we have no reasonable expectation of a police response, and if they do show up, there's no telling if they're going to stop for lunch on the way or head right over (Police response times in my city are right around the 15 minute mark. In Tallahassee, half an hour away, the response times are well over 30 minutes if they show up at all) because multiple state and federal supreme court cases have decided that law enforcement is NOT REQUIRED BY LAW to protect anyone.
The point is, if you're in a position to stop an active shooter, have the skills and tools necessary to end the threat or save lives, then it's immoral NOT to act to save those lives. It's not about money, it's not about family before strangers, it's not about being a hero ... it's about doing what is right, doing what you would hope some other armed citizen would do if you or your family were being threatened or fired upon.
Anyway, off my moral soapbox - ya'll can do what you do... Chances are none of us will ever find ourselves in an actual active shooter scenario, but if that situation arises, I'll do what the situation dictates, whether that is hiding, getting my family out of harms way, or shooting that sick SOB to keep him from killing you and your family - what I won't do is be a heartless, selfish, uncaring coward and simply run away at the first sign of trouble, and I won't stand by and watch someone murder dozens of innocent people simply because I'm afraid someone might sue me or arrest me.