This article outlines something that i've noticed about bullying on the internet:
http://www.dailymail.co.uk/news/arti...ry-people.html
Apparently, the pack/herd mentality exists because after the first person has transgressed social graces, the other 'sheep' feel that they've been given permission to do it too.
Apparently,a lot of trolling, bullying etc is done by those having a bad day who are looking for someone else to take it out on.