Are there negative influences in the Web of Trust? If not, are there theoretical alternatives?

Question

Suppose I encounter a trusted PGP key that isn't really who they say they are. I don't want to sign their key and promote that entity.

Can I somehow show my dissidence from the trust that everyone else is giving? I didn't see anything obvious on the Wiki page

If the answer is "no", is there any research that illustrates how this could be accomplished?

Answer 1

No, it's up to you if you want to trust (or not) person with a lot of signs. It's just a determinant of fairness.