I just upgraded the user registration system in this here WordPress-coded site, so it requires folks to type in one of those funny distorted alphanumeric sequences and to confirm registration within a week of signing up. The login screen looks a bit spiffier than before, too.
This won’t affect anyone who’s already got an account here. But this’ll keep me from having to clear out half a dozen or so of the bogus accounts each week from spam bots in Russia (9 out of 10 come from there, is the experience on this site).
Additional, 18 Jan: Previously, I’d had the moderation controls set pretty strict, such that even a single embedded URL would trigger a comment hold until I personally approved it. Given I think the new user registration thing should help prevent spam, I’ve increased the count to 3 for now.