What is it about USTA leagues that seems to make people so rude? Where has etiquette gone in the game of tennis? What are your strategies for dealing with people who can't call lines properly and / or emphatically question any close call? In a non league match, if people behaved like some of the folks I run into during league play do, I would just walk off the court and find someone else to play with in the future. In leagues, you obviously can't do that. What do you do, treat cheaters & jerks as another obstacle, like wind or a bad knee? Grin and bear it?