There is this weird series of postings from a blind man to the W3C P3P list, rambling about Privacy, PGP, government conspiracies etc. etc., all in emails with a picture of him and his dog. People have tried to stop him by telling him the P3P list is not the place, but he seems unstoppable, telling people that they are arrogant, that 'the creator of the web is listening' etc. etc.
In one of his emails he now mentioned this site;
http://www.w3.org/TR/turingtest/ which is a pretty interesting analysis of captchas and related technologies. I see this technique employed on more and more sites as a 'safety measure', but as this article clearly explains, its not as good as it seems. Various alternatives are discussed, and I'm interested in what the future will bring, but remember kids, do not anger the blind people, make it accesible. There are lots of less confused and nicer blind people who have every right to enjoy the web, they are not all fighting windmills.