Arguing with the FBI is not a good thing... even though technically the security guy is not a "peace officer" and can only practice citizen arrest, it's a BAD idea.
I was on the "casino island" in montreal. There was a huge spherical white structure and a pool with absollutely flat water in it... It was beautiful, I wanted to get the reflection.
The security guy comes up. "You need a permit to take pictures. It is government property"
"No we don't"
"Sir, are you calling me a liar?"
"Yes"
"I called the city hall (at 11:20 pm) and checked with them. Nobody has been issued a photography permit for today..."
"It's a public place. People take pictures of it all the time I have total right to take pictures. Are you trying to infringe my freedom of expression?"
"You can not take pictures here, sir."
"Can I stay in the park?"
"Yes you can, but you cannot take pictures."
Fine
We were walking around for 40 minutes with that guy escorting us in his cruiser.
I would LOVE to continue arguing with him, but:
1) montreal is not my city
2) I was breaking 11 o'clock curfew we have in canada
3) I had 6 beers in me, and a few more in the bag.
When confronted, KNOW that you have the right to take pictures.
LEO: You can't blah blah blah....
You: Sir, my legal counsil has advised me that it is within my rights to take pictures at such location.
LEO: blah blah blah?
You: Sir, am I under arrest?
LEO: No.
You: Thank you very much for your time, sir. I'd like to be excused now.