The problems are: peer pressure has changed (because society changed) toward the political correctness, social media give fats (especially girls) a lot of attentions and good opinion about themselves like haes and other bullshit.  They simply chose to cut away a part of reality and enjoy what give them some good feelz,because in the internet era you can fool yourself to think that the compliments on tumblr are more important than real life and you don't have to relate to people near to you but you can live with a mask and filters and the right angle some kind of fictional life online.  Why follow the path of self regulating if nobody teach you to do it?Instead we teach kids to love everybody,everybody wins,do what you want...