This is just a teenager stating his opinions based on what he observes in his peer group. It does not include any real data. That said, his argument seems to

This is just a teenager stating his opinions based on what he observes in his peer group. It does not include any real data. That said, his argument seems to almost boil down to, "on Twitter you can't choose your friends". There is no way to enforce a clique on Twitter. I wouldn't be surprised if the majority of conversation among teens is directed solely at their circle of friends, and not at the world and the common collective that Twitter seems to embody. The reason it's unsafe is that anyone could start following you! Imagine how terrible it would be if that crazy kid no one likes started following you, showing up at your parties and suddenly people thought you were friends. Or what if that mean jock started reading your twitter feed and made fun of your love of {insert obscure interest here}? The world would absolutely end! Everyone knows there's nothing more important in life than who you take to prom.