I was both a victim of bullying and a bully. I'm not proud to have been either. At both my primary and secondary schools there was 0 recognition of bullying or anything done about it. But I was never in the 'popular' group so no, I guess I wasn't a 'mean girl' like the movie.
After my school experience I have always taken bullying very seriously as a teacher and will be doing my best to equip my kids with the social skills to assist them in avoiding becoming bullied or being a bully.