there's a guy who plays in the local hall that feels the need to stand about a foot from the table directly in front of your shot. He will actually move around the table to be in front of your shots. To me that deserves a crack up side the head.
I was playing a guy a few months back & his friend that was not playing did that. At first I just thought it was a guy in passing but on my third shot he was there again. I just got up off of the shot & gave him an 'are you serious' kind of sarcastic stare. He moved away without a word spoken & did not do it again. I was a bit upset by the 'team action' & ran the table. His friend quit & they both left rather quickly. Maybe they thought they had been caught & were going to get their thumbs broken.