Even when visiting, the entire entry process with all the yelling to stay in line and complete your paperwork and fingerprinting and photographing is bad enough, then all the security theatre on the way back out again. You come away with the distinct feeling of being tolerated but not welcome, and that saying the wrong thing to the wrong person at the wrong time could see you detained for a period of time.

I always want to say 'OK, I get it, you don't want me here, sorry for trying to do business with your citizens'. But of course I just shut up and smile for the camera.