Chez Benj

As every wiki admin, I had to deal with spam. Speaking about it with my friend Mathieu, he told me about a simple but very efficient idea using captchas to block spam bots from altering the wiki. Captchas are randomly-generated images that display a string user has to type in to make sure she is a human. As a computer cannot easily decipher semi-obfuscated text printed on an image, it is easy to block programs ... and then spam bots.