This thread has struck a nerve. Allow me to venture a bit off track: In my experience, irrational security policies, mothers with their children, and out of control rent-a-cops have collectively become a real problem for photographers. Apparently, if you have a camera in your hands, you're either a terrorist or a pedophile or both. While I have never been arrested, I have been harrassed without legal justification on several occasions by security personnel.
In January, 2010, security personnel descended on me while I was taking time exposures of rides in the Circus Circus Adventuredome in Las Vegas. An unidentified woman had reported a man without a child taking pictures. That "man" would be me. The fact that I was a guest at the hotel (it's a sewer; don't EVER stay there) didn't matter to the rent-a-cops. Once they decided I wasn't a pedophile, they came to the inescapable conclusion that I was a terrorist scouting out the Adventuredome as a potential target. I showed them the photos I had taken:


I pointed out that photo surveillance was unnecessary as there are literally hundreds of detailed photos of the Adventuredome both inside and satellite views to be found on the Internet. I also mentioned that if they were so worried about a bombing (which they said they were), they should be checking the contents of the backpacks and sacks that everyone in the building seemed to be carrying. What really annoyed me was that no policy was posted anywhere regarding photography on the premises and the head rent-a-cop himself had no idea what company policy might be. He was making it up on the fly. That happens a lot.
Though the encounter was cordial, the upshot was I was asked to leave or the Las Vegas PD would be called.
Paranoia coupled with morons in positions of perceived "authority" can make for a *very* unpleasant atmosphere for photographers.
Dave F.