Spammers don't know math

It's a well known fact that comment spammers (both bots and human) don't know basic arthimatic. Because of this, I've added a comment test that asks you to do some simple math before leaving a comment.

Surprisingly, I think it's actually effective. My choices were to either do the math test or have an image test, and I hate those image tests because I usually fail them. Sometimes I'll get the ones where the letters are so distorted that even a human can't read them. Other times the color blends in too well. A few weeks back Pino joined myspace, and I guess their image test is really effective against stopping bots from joining, because he failed twice and he is a robot. Here's his myspace profile if you want to be his friend.

Sorry about the extra brain work involved with leaving a comment. I hope that doesn't stop you from commenting.