This. I have been staunch anti-social media for a while now, but not long ago I heard someone from a community I'm involved in say that the conversation on twitter was actually pretty intelligent so I signed up. You hear about how it's good to use these sites because you occasionally get pearls of wisdom, Nassim Taleb (funny because he actually has a twitter account) referred to it as digging through mountains of shit to find diamonds, sure, you may find a diamond, but you'll also be covered in shit.

EDIT: Deleted my twitter account after a month, wanna nerf LinkedIn as well but that decision has professional impacts.