Well, who is going to do that? What about all those browsers that don't get updated, and even so, why trust the update? This is the same problem as with Certificate Revocation Lists (CRL). For the most part, the relying party doesn't check.

There are better way, like talking to the friggin interviewee! There was one interview I went on for a government contracting firm (go figure), where I didn't have to give a technical presentation. And the interviewer had the audacity to ask me questions like "When is it okay to lie?", and "If you could invite 5 people to dinner, alive or dead, who would they be?". Little would I figure that he even had the ability or credentials to evaluate answers to such questions. Needless to say, I walked out of there laughing, and gave up on government contracting firms. I make my interviewees give a technical presentation, when then fosters a technical discussion. I can then easily discern their abilities rather quickly.