They do not only look for affection and attention outside home, but also look for proper parent figures on TV and on the internet. That is when all goes south, if you ask me. Many things can go wrong with a teen who does not find discipline and a model to follow when starts to learn from influencers from Instagram, Facebook or Twitter. Those people are fake and would only share what is worth for them to share: parties, women, alcohol abuse, gambling, etc.
The teen would eventually believe that is what a "winner" looks like and try to pursue to get a life of eternal party into his own life. It is even worse when the people followed on social media are cruel, greedy, mistreats women, etc.
Social media and easy access to internet for children are the anti thesis of proper parenting.