I'm feeling rather peevish today, and I missed this poll the first time around. My pet peeve for today is people who open a drawer, take something out of it, and then WALK AWAY leaving the drawer open. A corollary to this is when people open a cabinet, root around in it, and then walk away with their find, leaving the door open and everything that was in the cabinet hanging out on the floor and in between. Arrrrgghhh!
Oh, and I also voted for "baby's who cry in movie theaters" not because I hate babies and moms, but because it's "babies who cry..." Apostrophes where they don't belong is one of my pet peeves.