A while back, when someone wrote a nasty comment, I said that if this didn't stop I would start limiting who can and cannot comment. It really upsets me that now I have to take this action.
For the past few days, someone has been writing spam comments on my posts. I am a firm believer in freedom of speech, but I'm sick of having to delete so many comments because they're silly, unrelated to the post content, and most importantly, contain links that could potentially spread viruses to your computers. That's both not fair and not appropriate.
As of today, I'm reinstating CAPTCHA. I apologize to all of you who write thoughtful comments, and if the spamming stops then maybe after a while I'll remove it again. But I don't think it's fair to you or me to have to deal with spam comments, and I hope that the spammer realizes that their comments can be traced, and nothing on the Internet is ever truly anonymous.
To everyone that leaves non-spam comments, thank you very much for sharing your thoughts. I value your comments greatly, and I'm sorry that I have to do this.