For reference, and not in relation to any current event: This is not always appropriate. Rebuttal is appropriate for *legitimate* disagreement. It isn't actually appropriate when dealing with pure trolling, either of the "repeating something for the 10th time after it's been debunked 9 times" variety or the "Gish Gallop" variety.
People debating professional creationists, flat-earthers, climate deniers, "Tesla loses money on every car sold" types, and other similar trolls, have learned long ago that arguing with those people is not a matter of legitimate argument, but a matter of rhetoric -- they're not using legitimate arguments, they're using non-reasoning tactics, and you have to use non-reasoning tactics right back at them.
At some point, when dealing with genuine full-time trolls, the options are ignore until they go away (which *does not always work*); mock and insult them until they go away; or ban. The worst error one can make as a moderator is to ban the people who mock and insult a troll while retaining the troll; that kills a forum stone cold dead, as the people you wanted to keep leave en masse and only the trolls remain (and I've watched this happen more than once to forums). Moderatin' is hard.
I think in the last few months we have only had one genuine full-time troll here, but damn he was annoying.
