Booing at BK, Ha Ha.
Why can't people boo? This isn't tennis or golf and it's not high school or college. These are grown men, who make a ton of jack to perform in front of thousands of people every night. Pro baseball allows paying customers the right to cheer or boo. If a player can't handle the booing, then either play better, find a therapist or yogi master or play somewhere else where no one cares, like KC.