On Forums and trolls:
"Let them walk against a hill of politeness, and then let them slide off. Have a ban-request as forcepunch somewhere near, if they try to break the hill despite explicitely having been warned."
https://www.draketo.de/english/comments/light/how-to-fare-with-trolls-in-forums
Still as relevant as it was in 2007.
It’s sometimes hard to stick to it, but always worth doing so.