From Mrs. Marine and the Tiny Troops: Blogging Tips: Comment Forms - Say NO to CAPTCHA: "First off, Please, I'm begging you all, turn off Captcha!!! Disable Captcha for blog comments!!
... unless your having problems with spam and you think a computer is generating the spam, then what do you need captcha for? Want a second opinion? Click Here!It's really annoying when I fill out the log-in info, click "Post Comment", I assume I'm done at this point, but NO the form refreshes and then the Captcha shows up, its a little easier when its at least there to begin with...."
I can't agree with this more. It's so annoying when I go to submit a comment on a blog, think I'm done, then later realize there is a pop up comment box waiting for me to enter a tangle of often illegible letters. If you are a blogger and do have a problem with spam, I urge you to moderate your comments, not make it harder for fans to interact with you and your blog.
I'm joining up with bloggers saying "NO" to Captcha!