janharders - 9:08 pm on Jul 16, 2008 (gmt 0)
that's right, ergophobe. it's pretty much what Bot-Trap uses. a hidden link to a directory which is disallowed for any bot in robots.txt. a user won't click, a bot that does not follow robots.txt might. a hit leads to some kind of analysis, possibly a captcha to prove you're human and indeed landed there by accident, and a ban if you fail to prove so.