How do you deal with people that always question your line calls? There is this one guy that questions every line call. Like seriously, he will question balls that are 6 inches out. It has gotten to the point where when I play with other people, whenever someone asks "are you sure" someone always makes a reference to that guy. It's annoying because he throws a tantrum over semi-close calls and he makes me feel like a cheater when I clearly know I'm not. His sons do the same thing and when they play doubles together it is awful.