Well, yes, there is going to be some inevitable crap, but the purpose of signalling is so that you could impress a much larger pool of people. So it might not be much help for gossip journalists, but it might help with the marginal professional ethicist, mathematician, or public figure. In that area, you might get some additional "Anybody who can do that must be damn impressive.". Does the additional damn-impressive outweigh the cost? I don't know, that's why I'm asking.
The discussion about mean vs variance in this post may be relevant.