Better question, do we need social media?
The media used to bash Facebook continuously, in my opinion, they've noticed Twitter has been gaining more popularity (in my opinion it's better than Facebook) and have decided to bash that instead.
I deactivated my Facebook account for around 6 months, and then reactivated it because my friend kept complaining about not being able post stuff to me. I only have Twitter too, to speak to people who I don't have phone numbers for, otherwise if I had their phone number then I wouldn't have Facebook or Twitter.
To be honest, I've rarely seen any hate posts directed at users on Twitter.
Actually, think about it in a wider sense, the media blamed films, then games, then Facebook and now Twitter? YouTube next?