>>Piltdown is a mark against the credibility of the scientists who claim to be speaking on the validity of the ToE.<<
It was a scam perpetrated by some individuals. It was science itself that exposed it.
>>So your analogy is wrong. A more correct one would be that since some televangelists are frauds and shysters, then one would be perfectly justified in suspecting that the next one that comes along is likely to be one as well, until it can be demonstrated through careful scrutiny, that he’s not.<<
No, your ilk use Piltdown as an attack on TToE itself. Guilt by association is probably the weakest attack that can be made. Your recasting the analogy doesn’t make any sense and is inapplicable.
And creationists never believed it to be genuine in the first place.
You may not agree with the reasons for their conclusion, but they were right.