On Fri, January 18, 2008 9:31 am, Richard Heyes wrote: >> Or even a simple text CAPTCHA "What is 16 divided by 4?". > > Careful though, I made a class which converted numbers to text > (TextualNumbers IIRC) and it got broken.
Almost any CAPTCHA can be broken if somebody wants it badly enough. Some are easier than others, of course. But you get rid of a LOT of bottom-feeders with a CAPTCHA. CAPTCHA has serious usability drawbacks, however. I would suggest NOT going for something really hard for a human to use -- I believe that it won't make THAT much difference to the number of junk eliminated. -- Some people have a "gift" link here. Know what I want? I want you to buy a CD from some indie artist. http://cdbaby.com/from/lynch Yeah, I get a buck. So? -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
