When I was in high school, I was able to take two years of Russian language (which I've forgotten nearly all of). Senior year, we took a class trip to the USSR (spring '86). We were told lots of things to not take pictures of, like powerplants, military anything, police and so on.
So, our tour bus is sitting at a Moscow traffic light between the tourist hotel and wherever we were going, and one of our guys points his 35mm out the window at a traffic cop's car stopped next to us. Mark drops the camera into his lap and turns pale. "He looked right at me!" The light changes and the bus pulls out, Mark is staring rigidly ahead. A few of us crane our heads around to see if the cop begins to follow us.
"Oh, yeah, Mark, here he comes after us.... Yep, he's pulling around the bus...."
Of course, the bus stops at the next light, and I'm the one on the driver's side looking ahead. "Yeah, Mark, he's talking to the driver."
Of course, the cop wasn't following us at all, and the bus pulled away from the next traffic light without letting any cops on.
I can still hear Mark's voice, "You guys are full of s***."
It gets better, about day #3, Mark realizes he hadn't put any film in his big Nikon yet. Three days of touring Moscow, no pictures for the president of the school's Photo Club.