Adweek challenged a number of agencies to dream up campaigns against cyberbullying. The results are well worth a look. Arnold, for example, suggested a "Team Up" theme designed for social networking sites, an interesting approach in which teens get each other on board. The campaign would include what was once known as a "roadblock" (at least this was what the technique was called at the height of the broadcast TV era), with all major social media carrying the campaign splash page on sign-in. All the proposed campaigns are fascinating and well done.
Several online activities already advocate against cyberbullying, including the National Crime Prevention Council, McGruff (also NCPC), the Girl Scouts, and STOP cyberbullying. Marketing can and should add its voice to the fight against cyberbullying.