Hi rpenmanparker. My primary reason for hiding ammo, would not necessarily be concern for theft of the ammo itself, due to weight, but more so over the fact that having a decent supply of ammo generally coincides with having more than a couple firearms, which increases the likelihood of those firearms "walking off". Having worked in the property management field, I can say that there are really good managers, maintenance, and contractors, and there are some really unscrupulous ones out there. I think it is both reasonable and responsible to make an effort to not make ones ammo supply and firearms a target for any would-be thieves/criminals.
Some reasons to hide ammo but not a TV include:
Most people use their TV on a daily basis, so convenience is more of a factor than security.
Insurance is more likely to cover large TV, versus large amount of ammo.
If stolen, much easier to replace a large TV, whereas an ammo collection may have taken years to slowly build up and may be unavailable depending on several factors beyond an individual's control.
It's pretty hard to use a TV to commit murder or armed robbery.
Nobody is going to call the cops because you have a large TV and must be planning to watch a lot of people with it.
Nobody is trying to ban large TV's (except maybe the enviro-wackos).
When in an apartment for an inspection or to complete a work order, maintenance should have an eye out for anything that may cause an issue such as a safety hazard or lease violation. Some tech that is not knowledgeable about firearms, etc may think it's a "fire hazard" or "explosives", or may be concerned that excessive weight could cause structural damage or that you are a danger to the community.
Those would be my main reasons, and I'm probably forgetting some also.
