Good ideas and conversation. No ads, no tracking. Login or Take a Tour!
If someone were willing to make that effort, I'd almost be flattered. :)
I'd ignore them, so their comment would sort to the bottom, and if others ignored them, the same would happen. My guess is that they would run out of steam eventually. If we don't take the good with the bad, then we are left to determine which is which. If it became real problem, I'd probably consider some other approaches, but I don't think civility can be enforced very well.