My brother introduced me to metal when I was 11 or 12, so I don't think it had any connection to me being bullied at the time - I'd definitely say listening to various songs and doing some vicious PvP helps me deal with moments where I find myself too angry to have a rant.
Also, I think Jamie does have a point in a way - people are either bullied, or bullies. Atleast in most cases, thinking back at how my school worked. One of the things I also hated was people who were too afraid to stand up for others - I've managed to get into a lot of trouble for standing up for friends or just random people, but I think it's really important to show that it's just not acceptable.