I’ve removed this from logins. It will now be required for registrations only.
To prevent bots (and I’m looking at a blog or so as possible spammers), I’ve added SuperCAPTCHA. I apologize to those who will have a harder time at login, but I cannot allow this blog system to become a haven for spam.
If things are very stable, I’ll remove CAPTCHA from logins but leave it only for registrations.