I'm really sorry to have to do this, because I don't believe in the censorship of ideas and I have never removed a comment because it disagreed with me.
But I found so much spam in the comments section of my blog this morning that it took me more than half an hour to get rid of and report it all. It's all identical in format so I'm presuming I'm on some kind of robotic spam "to do" list all of a sudden.
I am turning on comment moderation, which means that I'm pre-screening comments and trackbacks. I will turn this off as soon as the spam problem dies down. If it keeps coming in (which since it's automated, it might, as I presume bots can't tell that their comments aren't being published), I may turn comment authentication on for a few days. I hate to do that, though, because I hate like hell when blogs make me create an account to comment.