Hackers have broken the Captchas log-in security precaution using a combination of methods.

I’ve never used them anyway.

I use WordPress software. A company which found a far better solution:

… answer is to focus on the content rather than the user. His Akismet system for preventing spam comments relies on a combination of secret algorithms and community reports, and has proved remarkably effective.

“Ultimately Captchas are useless for spam because they’re designed to tell you if someone is ‘human’ or not, but not whether something is spam or not. Just because something came from a real human being doesn’t mean it isn’t spam, which is why content-based solutions like Akismet are the only long-term solution to the spam problem.”

How Captcha was foiled – Guardian