On Tue, 2004-03-09 at 11:33, Matthew Cline wrote: > On Wednesday 10 March 2004 03:13 am, Bob George wrote: > > Matthew Cline wrote: > > > >* Anonymous posters are only allowed a small number of posts per time unit > > > per IP address before they have to prove that they're human through > > > captchas (see http://www.captcha.net/). Registered accounts are allowed > > > a higher rate of posting before they have to prove their human. > > > I'm on another list, frequented by a variety of users of older systems. > > One such user is blind, and has frequently lamented about the lack of > > usability imposed by such schemes. Section 508 for government agencies > > in the US and other similar policy require(s|d) that such mechanisms > > make adequate accomodation. > > There's the option to listen to a garbled audio recording, and type up what > it > says. Of course, that still leaves users who are blind *and* deaf out to > dry, but nothing perfect.
Actually, I've heard stories of spammers breaking captchas by setting up fake free-access porn sites. To sign up for an account, you have to pass a captcha - which the spammer sets up to link to the one they're trying to break. So even Turing tests can be bypassed. (as if spammers hijacking machines with viruses isn't enough... thev've come up with ways to hijack the users themselves) - Jon -- [EMAIL PROTECTED] Administrator, tgpsolutions http://www.tgpsolutions.com
signature.asc
Description: This is a digitally signed message part
