If you want authentic materials for your lesson but don’t have time to search the net, here’s something for you. Topical, engaging news articles and video clips with suggested teaching ideas.
The French government anti-bullying site (www.agircontreleharcelementalecole.gouv.fr) has a short film (1 min. 46 secs.) on this topic entitled 'Les injures'. This could be shown to students from KS3-KS5 as the language is marginal to the story and it is interesting to see how the French are responding to the rise in cyber-bullying, which many students may have experienced themselves.
Thanks to @HelenMyers for mentioning this site to the #mfltwitterati on Twitter!