There are really two types of trolls and they're completely different things. One type is the person who does rickrolls, feigns ignorance in technical forums,

There are really two types of trolls and they're completely different things. One type is the person who does rickrolls, feigns ignorance in technical forums, and generally is more of a prankster than anything else. And then there are people who would be best described as terrorists. These are the people who drive teens to suicide. These are the people who send death threats to Kathy Sierra. These are the ones who need to be arrested for harassment.