The internet is a bitch, It's the one place where people can act how they want to act, a place where you can have high amounts of power even when in real life you are small, made fun of, etc
Most people on the internet act like dicks because they no that tomorrow they wont see you at school and you wont kick there ass.
Basically no matter who you are, your personallity is different on the internet, or throughout your time on a forum it will change.