[thdc]

I assumed that the two paragraphs were connected

> Enter Akismet. This is a spam detection tool by the Wordpress people and is pretty accurate and easy to use.

> Blocking spam on signup worked somewhat, but was easily circumventable by spammers who are well versed in dealing with these kinds of barriers.

But now that I look at Akismet's description, it sounds like Akismet does a lot more than block on signup. Perhaps they use it after signups but apply the frustration loop instead of blocks because it's less accurate there.