[OpenID] OpenID's effect on CAPTCHA

[Rabbit]

This is more of a philosophical musing than a genuine concern but it  
occurred to me OpenID might have an impact on how Captcha systems are  
implemented. The signup process is typically the gate where we stop  
robots. I can almost positively say I've never had to prove my  
fleshiness to a login form.

Services rely on OpenID to prove a user is *who* they claim to be.  
Should services also rely on OpenID to prove a user is *what* they  
claim to be?  The cautious would say no but I thought the question was  
interesting. Should proving to Google that I am a human be good enough  
for an RP to believe it too? Is there an implied transitive property  
of trust that comes along with using some services as opposed to others?

Just a thought.

=Rabbit
Cyber Punk Rock !