Why is it more girls than boys to get involved in cyber bullying?

teenagers are given a bad name yes but even an ad for facebook in school even said that 90% of girls than boys are more involved with bullying on the internet why is that though i actually hate girls really because they are just so bitchy and sly and no i dont hate myself i have been bullied on fb in the past about 2 times and it scared me but oh well people say things on there they wouldnt say in real life and fb is evil it causes problems so why is it that girls are involed to be bullying others on the internet? i hate the sort of people who love to argue to p.s dont answer if youve got nothing nice to say!