WEB - word recognition turned on th thwart spam posters

I've just been machine-spammed. I won't mention the company name since they don't deserve any advertising from me, but as a result of having to remove 15 posts from the same spammer, I've decided to turn on blogspots word recognition for posters. It's cake to deal with if your a human, but it has a tendency to baffle the machines (for now)