The Independent: Teachers worried as girls go top of the class for cyber-bullying

[UK] A survey by the Association of Teachers and Lecturers (ATL) reveals that half the teachers believed girls' behaviour had got worse during the past two years. [...]

They were also more adept at using modern social media such as Facebook to bully their fellow pupils. [...]

Another teacher drew attention to a rise in the use of social media to bully pupils. "There is a lot of cyber bullying particularly via MSN and Facebook - this is mainly girls."