If the immediate goal of the action of trolling is to cause disruption or provoke emotional reactions, what is it that makes people want to do this disruption or provoking of emotional reactions?
Overtime trolling has evolved to be less satirical and more hateful. That is not to say there were not hateful forms of trolling before, because there were. However, with the entire internet at one's fingertips, I think people constantly try to one-up each other and cause large-scale reactions.