By "trolls" I don't mean those who make up convoluted fabricated stories to suck people in. I mean the classic troll, the goady-fucker-to-the-max type, the obvious-troll-is-obvious who just posts the most provocative comments to try to get a rise out of people. And people engage with them! They might try to argue with them, they might berate them, they might try to poke fun at them. However they do it and however well-intentioned their engagement, all they're doing is satisfying the GF's agenda and giving them the attention they crave.
I know it's tempting to post a smart knockdown or a faux-pity "sad little troll" comment but even that simply plays into their hands. No publicity (/attention) is bad publicity for a troll. I long to see a thread where Obvious Troll starts metaphorically jumping up and down shouting "look at me!" and everyone just ignores them. And then quietly reports them to MNHQ.