Hm...lot's of bad things you can do. At the top of my head...
1) Kill. This includes killing children, mass murder, killing for pleasure, torture then murder, genocide... etc
2) Mental torture. This includes lying lying and lying, taking advantage of people just to do it, etc
3) Hate. This includes being filled with hate, hating people, hating everything, and acting on that hate, etc
But there's a ton of more things ^-^;