The users themselves, based on guidelines, would select their 'skill level' ratings. This skill level would be based on voluntary 'self marked tests' or knowledge guidelines, that the users would participate in.

It occurs to me that The Seven Stages of a Perl Programmer would make easily recognized skill ratings, and amuse people.

(Perl adept, working on hacker)

--
The hell with paco, vote for Erudil!
/msg me if you downvote this node, please.
:wq