there are so many of these things that I can agree with you on.
Three big ones for me are:
1. Anyone disrespecting my family in any way.
2. People who hate/profile because of type, personality, color, religion, sexual preference or by class - drives me friggin crazy....I see Everyone as equal, Depeche Mode said it best in "People are People"
3. Pedophiles and Child Abusers - even hearing/reading about it sets me off, so I avoid it at all costs because if I found the person I may end up in jail (happily).

Smaller one of mine is how much I edit my posts for spelling lol