Ya know the thing that irks me about this thread, even though slightly off topic, is that a lot of people, including some police officers, simply DON'T KNOW what are actual laws, and what are rules made by private corporations, as have been demonstrated on threads here about biking in the street/sidewalk and such.
examples...
Some employees must consent to searches of their personal being, and TOLERATE it, unfortunately in low paying jobs where they don't have a lot of power to speak up against it. No expectation of personal privacy whatsoever on company property.
Some cops, transit cops, and private security restrict photography in public places, which has no legal backing at all. I love the infrastructure and architecture of airports, subways, tunnels, and love taking pictures. This has been a big discussion in other photography groups, but how many times do you think someone has told a tourist of someone "You can't take a picture here", and they just blindly follow it?
HOAs and developments. Even a lot of streets are OWNED by private companies. There's a retail block in a neighborhood here but connects two city streets in the grid so you wouldn't even know it's private, but they COULD tell me I'm no allowed on the street without a tie on.
I'm trying to think of more examples, but I see this type of thing a lot, where I'll see a sign/rule/or policy that is made by a private person or company, yet has no legal bearing at all, yet no even considers that fact it really doesn't mean anything.
OK here's one: A sign on trucks that say "We are not responsible for broken windshields". Well, if you loaded your truck incorrectly, and it causes damage to me, you ARE responsible, and a sign (rule), doesn't mean BS.
Anyway blah blah eminant domain case in Connecticut and on and on, but I think it's worth educating yourself on the subject, and the initial "you can't have a backpack here" issue grow into more with so many cities privatizing projects, so basically your rights land at the COMPANY's discretion, and don't fall under the actual law.