Comment: Re:Erosion of the Commons (Score 2, Informative) 544
In general, the *USA* laws say that you can legally photograph anything visible from public property that does not require "specialized equipment", and anything on public property. You cannot legally take photographs of places where people have a reasonable expectation of privacy, including in restrooms, within private dwellings, and underneath clothing. Exceptions exist, but the law is far less restrictive than social norms are about photography.
The UK laws imply that you have the right to apply lubricant, if you brought it, before they violate your rights.
IANAL, but I have fun with a DSLR, and educate myself on what I legally can or can't do with it.
In the parking lot, the most the guard has the rights to do is to ask you to leave, and to escort you off the property. The police can escort you off the property, should a representative ask you to leave. Confiscation of cameras in the US is theft. Charges of wiretapping are bullshit, and routinely overturned when some police officer feels threatened by a camera.