i, personally, get very* ticked off on little things& very frequently... hearing this one girl in Social Studies can ruin my whole day, someone clicking their pen in&out can be real bothersome, and people whispering when its really quiet gets on my nerves.. =/ but, if i dont at least* try to stop it, it`ll drive me insane, so you know what i do? dont talk to the girl at all& find conversation somewhere else [besides, she mostly talks nonsense]. I tell the owner of the pen to please stop, and that it bothers me. I ask the people to please stop because i actually want to learn [pssh!].

maybe you should try stopping it -politely-. if someone`s chewing with their mouth open, you coud ask them not to.

~~dont ever forget to always be polite though.. there are some out there who will actually get irritated themselves* if youre not nice & they can be really mean keep doing it on purpose. so, if the open mouth while chewing is bothering you, be nicer than `close your pothole before i do!`. people generally dont find that pleasant >.<
well, i hope i helped some(:
>>Danni