So list them. Doesn't mean they need to be banned, or are wrong, nor does it mean you're wrong for disliking them. Just a list of things that you find personally offensive. Stuff you don't like at all. You'd rather they didn't exist.
Here's some to start off:
1) Emo haircuts! http://royoyo.com/images/2009/04/emo_boys_hair.jpg
2) People not putting their knife and fork together when they've finished eating
3) Spitting in the street
5) Tony Blair
6) Hunting with guns
7) People who use the word "chav"
8) Jeans hanging low so you can see the person's pants
9) Passive aggressive Christians
10) Really fat people
No-one have a teary, this is meant to be a fun thread right?