I've got a blog that was getting a ton of spam comments. Askismet was catching all of them and sticking them in the spam folder, but I liked to to through the spam folder to check for legit comments (false positives). I was getting so much spam that I gave up on that. Anyway, I added a math question that you have to answer to submit a comment, and for a while, I got no more of this automated junk spam. But now I'm getting a ton again.
They all end up in the spam folder, so it's not ending up on my blog posts, but it prevents me from checking through the folder for legit comments.
Any idea how they are getting by the math question? I can't believe these are all manual spammers, are they? I'm assuming it's some automated program...