I was at a game a few years back and sitting right behind the bench up in Boston. This is when we had Ewing and Starks and Oak and we were winning. During the timeouts you could see Starks staring into the crowd. Riley went ballistic and yanked him from the game. If I'm not mistaken he suspended him for a game after that. After that we paid close attention and you could see all the bench players were staring into the crowd. Then we watched the Celtics and half their guys were doing the same thing. I think coach's tolerate it unless it's a starter. To be honest when I'm coaching I don't even notice anything but my guys that are on the floor(and they better be listening). The rest it doesn't matter.