I admit, I’m using the same tool (but I force all registration through WP so I run a plugin there). It’s actually used with Bad-Behavior and Akismet, since those were catching about 90% of the forum spam (and 99.99999% of the blog spam). Dunno what it is but you get more spammers able to make accounts via bbPress than WordPress.
(Posted by “ipstenu”)
via http://bbpress.org/forums/topic/new-stop-forum-spam-api-plugin-block-fake-user-registrations
I hadn’t activated akismet before and hadn’t heard of “bad-behavior”. I have now activated akismet and have installed bad-behavior. I got my first few comment spams in the last couple of days. Cool, I feel like I’m really blogging now…