This is a thread in the flamewars category, that talks about flamewars in general. I couldn’t think of a better place to put this piece about a journalists/writer’s attempt to engage with her twitter trolls
TL:DR (though you should) Trolls is a bad word, they should be called what they are, abusers. They want nothing but to hurl abuse. Don’t waste your breath. Don’t engage, and if you’re worried they’re using your platform to reach your followers. Subtweet them at your followers while not mentioning them.