Stuff that pisses me off.

Number 1: certain types of parents.
My main rule (and this is me not having been in any sort of relationship or anything, and I'm from a loving household- you don't have to come from a broken household to appreciate the values of parents, believe it or not xP): do not have children if you will not be there or do not want them.
^this above does not in any way, shape, or form put forth an opinion on sex before marriage, young (consensual) sex, or children born out of wedlock. This just puts forth my opinion based off of what I've seen, mainly married couples that (in my opinion) should not have had children.

1. People who foist their children off onto others, be they kids or parents. I know at least two people (different families) that do that, the first with two kids (mostly the baby) and the other with three kids (one is three-ish, the other two are 1.5 year old twins), and this always strikes me the wrong way.
Is there any other way to take it? I mean, really.

2. People who are never at home. I know one family who I carpool with where the mom is a doctor, the dad is some high-ranking business-man-type-thing for a company, and the sister's in her freshman year of college (she just got back yesterday, as the college school year just ended. Mine will be ending sooooooon...). The son is the one I carpool with (although that's ending this year, gladly), and he seems to always be un-monitored.
Apart from this being a really crappy way to 'take care' of your children, this very effectively lets them get into who-knows-what kind of bad things.

Yeah. I hate bad parents.
That being said, I love my own very, very much.