From experience there is no such a thing as "mistake" in DT's cult. It's this redundant sentence "Trust system is not moderated to avoid abuse", my favorite joke.
I mean if trust is not moderated then who are these DT members? Lol
Believe it or not I've seen Lauda, JollyGood and several other DT members, past and present, withdraw red tags before.
I'd like to think that one of the things that makes a good DT member is their ability to recognize when they were wrong in the past and make adjustments to their ratings accordingly. It's the "I'm still right in the face of overwhelming evidence to the contrary" position that tends to land people in trouble.