I have a list of 250,000 people here (scraped off web sites) to whom I'd just love to make recorded phone calls. Can I use your protocol to ask them all if it's OK? If not, why not, and how are you going to stop me?Using a Turing test (CAPTCHA) for example. http://en.wikipedia.org/wiki/Captcha
There are many well known ways to defeat CAPTCHAs, unfortunately. R's, John _______________________________________________ Ietf@xxxxxxxx https://www1.ietf.org/mailman/listinfo/ietf