One of my pet peeves in the pool hall is having my oponent spend long minutes on his cell phone while playing a match with me. Now it's not so bad when they simply take the call, tell the person they are in the middle of a game, and hang up. It's when they get multiple calls within a half hour or so and sometimes spend 5 minutes or more in conversation while you stand there waiting for them to shoot. Maybe someone should invent a jamming device that prevents cell phone signals from getting through.