Depends on the format, and what kind of troll.
If its, say, over voice chat, they’re usually losers, and laughing at them with absolute amusement usually just hushes them up.
People typically just bail if you start hysterically laughing and say “Are you for real?Oh my god, say it again, I gotta record this so I can show my friends someone actually said that cheezy internet line for real!”
I don’t usually like shaming people, but tit for tat, and all that.
But when its just real nasty, mean digs, I sometimes will throw people a bone, if I’m feeling charitable. Sometimes asking people “What happened to you to make you act that way” breaks the floodgates to some fascinating, but deeply hurt hearts.
And then there’s the kinda old school chaos gremlin trolls who the whole thing, and are actually kinda funny, in which case, its called, We do a little trollin
A PowerPoint about Protect
Its the best move, but bears that use Kung-Fu complicate the situation.