goto yahoo answers and ask about dogfighting in the dogs section. you'll get a pretty firm grasp on trolling after doing this a few times.
easy to follow steps:

1. ask Q about dog fighting in dogs
2. observe RAGE
3. if you got banned from day 1, just make a new one. takes like a minute and you don't need a valid email
4. revise your post in a way that you think will procude more RAGE based on day 1
5. repeat steps 1-4 until every single reply is a death threat
6. ????
7. PROFIT!