User blog comment:Kirkburn/Technical Update: February 10, 2015/@comment-5558012-20150210212412/@comment-1251315-20150211151214

I know what it is, but as a webmaster, I know that the programs spammers use to read the images have broken the technology behind the reCAPTCHA.

Both the basic CAPTCHA and reCAPTCHA got broken years and years ago, it doesn't stop bots whatsoever because their OCR scanner programs can interpret the text and numbers within it.

There are far more appropriate and non-broken spam preventions out there, CAPTCHA/reCAPTCHA should not be used, it doesn't slow down spammers at all.