One more way to fight splogging

Google made it very easy to blog, and the spammers have joined the party - uninvited. I think one feature that Google can implement very easily is to include word verification (through picture) when posting comments. The administrator of a blog should be able to enable or disable this option - or better yet, Google should make it mandatory. Obviously, this won't solve *all* the splogging problems, but it will at least get rid of most of those annoying fake comments.