All The Tropes Wiki Project, Part XXX

[Bob Schroeck]

None. If it's a bot, then let them think they've vandalized us, so they don't try again. If it's a human, don't give them the attention they're seeking.

What Rob said. If they come back and try again, that's what the "Mark as Spammer" link in Moderation is for -- click that and anything they try to post ever again goes into the bitbucket without us seeing it. (We can turn it off if we make a mistake... but IIRC we've never needed to.)

EDIT: And I see someone has already done that. Meanwhile, is there any way we can extend Moderation to cover the "User talk" namespace? It's obvious our shitposter realized that it's not protected.