I have just edited a comment for the first time in this blog's lifetime. In this particular case I just removed the commentator's chosen pseudonym, which was obviously calculated as a taunt.
I'll take this as an opportunity to explain my idea of my combox. To quote a piece of deep popular wisdom, you can call a spade a spade without calling it a fucking shovel. Now I'm actually OK with an occasional swearword, but I think by analogy you can e.g. argue against my religion without blaspheming. I'm often happy to pick a fight. You're free to make aggressive arguments. But you can always do that without words calculated to hurt more than the ideas they express.
For illustration (not the example I just edited), if you want to tell me God doesn't exist, that believing in him is totally irrational and that he wouldn't be worthy of worship even if he did, that's totally fine and maybe we can even pick a nice fight on it. But if you can't explain that thought without referring to schizophrenic delusions of a fascist sky-daddy, your comment will probably get edited or disemvoweled or deleted.
I'm keeping this vague on purpose, because I don't want to get into pseudo-legal arguments over some kind of formal rules. Basically I know it when I see it, and on this here blog it's me who sees it. This is not some kind of game, just me expecting guests to behave themselves on my front porch.