Originally Posted by Human Unit 763246B
I presume that if you take pictures of a military post you can be charged with spying.
How about if you take pictures in a museum that has a small notice saying "no pictures".
Jail? Is it a law or just a museum rule? In my house, there are rules, too, such as putting the toilet seat down but no fine or jail results from breaking the rule.
Assuming a private museum, entry is by license. If you violate the license, you are a trespasser. In theory, trespassers can be arrested.