I think venting is a totally cathartic way to blow off some steam, but sometimes you don't want to do it aloud to your friends, coworkers, or significant other for fear that you'll be so negative that you bring them down. Which is why I'm glad I can turn to the Internet for this need! PeevePile is a site where you can anonymously (or not) post your biggest — and smallest — pet peeves.
I guarantee no one will comment on your peeve to tell you that you shouldn't waste your time worrying about things that small; instead there's a chorus of "Oh I KNOW"s.
Right now I'm in total agreement with the peeve of when people apologize by saying "I'm sorry if I hurt your feelings." That's not a real apology! Oh, I feel better now, don't you?