Wow that's a long answer to ask for!
Well, I would start with sexists, racists, teachers who teach for the bloody MONEY, corrupt politicians, people who judge others based on their religion (including atheism), people who judge others on the basis of which college they went to, people who just think they are SO the cat's whiskers, people who are incredibly ungrateful for what they have and just keep saying 'my life sucks' when it actually rocks compared to most people, Stephenie Meyer (she killed literature), snooty people who think anything unrelated to science is useless (or vice versa), people who don't care about the environment...
Phew! There are also a few people who deserve to be cast into Orodruin, but that's a but too personal, so I wont say any more
May Iluvatar burn their souls.