The last day or two somebody found the blog and started spamming the comments section. All the emails for comment approval started to become a distraction. So this morning I’ve enabled reCAPTCHA on LinuxGems.
There is a reCAPTCHA plugin for wordpress that makes the captchas a snap to set up. It probably took about 5 minutes including signing up at recaptcha.net.
If you’re not familiar with reCAPTCHA, they are a bit different from some of the other captchas out there. reCAPTCHA uses a pair of words. One of which is a known word and one of which is a word that failed OCR. To pass the captcha test the user has to get the known word right.
The second word, the one that failed OCR, is actually text from older literature that needs digitizing. So using reCAPTCHA is a bit of a public service. When a statistically significant group of people put the same value for a given word then reCAPTCHA knows that they have figured out what the word was.