I'm guessing programmatically identifying trolls is a very hard problem. You could identify the really obvious ones from a blacklist of words (e.g. insulting wo

I'm guessing programmatically identifying trolls is a very hard problem. You could identify the really obvious ones from a blacklist of words (e.g. insulting words, swear words) but I imagine many require real world and topic specific knowledge to identify (e.g. implying silly things are true, insults that require parsing a sentence or two to understand).