I love how things can be labeled as unprovable in a snap by people who doesn't suffer from such quirks.
Personally I can't stand people who are eating stuff or chewing gum while they are on the phone with me. Same with noisy eating in a silent place. I sometimes silently leave the place if I can, or warn the eater as politely as I can, if he/she's my friend.
Heck, if I'm extremely tired or weary I can not even stand myself sometimes.