trolls
You should deny them the oxygen of attention. It would be even better if we can deny them the oxygen of oxygen.
The main problem I have with the forum trolls is that the great majority of them just aren't particularly funny. It would be a different matter if they were.
Look up TV-Tropes entry on "Actually Pretty Funny".
I think it starts with "Ever wanted to punch somebody in the face, but you couldn't because you were laughing too hard?"
Poetry?
“Trolls call me
moon of dwelling-Rungnir,
giant’s wealth-sucker,
storm-sun’s bale,
seeress’s friendly companion,
guardian of corpse-fiord,
swallower of heaven-wheel;
what is a troll other than that?”