> Twitter or Instagram are not and never have been platforms in which people form social communities with their peers.

By peers do you mean people they know in person or demographic peers?

I'm not going to anecdata [edit: then I do] but on platforms like Facebook I only have friends that I know personally (or at least when I used to use it). Twitter was the opposite.

Oddly the most online abuse I've had is during in game chats and providing open source software but I digress...

The "rock and roll" thing is because "think of the kids" is a perennial siren call. Only sometimes is it valid. I can't speak for everyone but there seems to be a consensus that "social media" can be deeply harmful for some young people and we should not ignore it. That this one guy made a study and it happened to support his hypothesis isn't enough for this one voter to want to ban online networks of pesky teenagers calling each other names and buying stupid crap.