Okay, so, @Zas and I both misread the numbers since the report we were looking at apparently didn’t actually take the dates given to it into account.
We’re looking at some other stats and the forum is getting around 90–140 new “users” per day. Most of these are likely bot-created, which means most likely spam accounts (passive, active, or “sleepers”). The forum also gets less than MusicBrainz.org, since 1) I have blacklisted a number of known spammer-only e-mail domains from getting accounts on the forum at all, so forum stats are not fully representative, and 2) accounts only get created here once the e-mail used for MB signup has been verified—so there are probably a fair number more “bad” accounts on MB, but probably not in the 1000s/day range… yet/luckily.
Still, the numbers are too damn high, but we need better tooling before we can do anything effective about it, so the plea to not report spammers still hold.