piercings on babies/anyone under the age of 13!
little boys with their heads shaved/crewcut 'to make them look like proper boys'
agressiveness towards/swearing at children (if they're like that in public, wtf are they like behind closed doors?)
people who take their tinies out and ignore them, don't talk to them in restaurants/cafes, don't chat as they walk them along, just silence. Just because a child can't talk, doesn't mean they shouldn't be talked too...
people who constantly brag about their dcs achievements and ask 'oh, isn't dd doing that yet?' in a concerned-but-patronising voice
Those baby on board signs that go "PULL BACK! SPARE THE LIFE OF MY CHILD!" - yes, because if you hadn't had that up in your window, of course I would have repeatedly rammed you....[rolls eyes]
people who assume that everything they like/dislike their child will like/dislike - my sil once said to me 'oh, don't give my dd carrots, she won't like them' - when I asked had she tried them, she said no, but 'I don't like them, so she won't either' - wtf???
slaggy clothes on little girls
bugaboo prams (sorry, but my sis has one for her dd and it's treated better than her dp!)
hygiene freaks
whale music/white noise/womb music tapes that your friggin' relatives insist is the only thing that will get their pfb off to sleep and play at ten thousand decibels at 2 o'clock in the morning - then act surprised when you say you didn't sleep too well the next morning!