I don't know about how right or wrong Lauda was with his/her trust feedback, but if a user deserves the negative feedback, wouldn't they have received it from more users than just Lauda? Therefore, won't they still be red?

I also believe (as already mentioned) that users shouldn't take the whole list in Lauda's feedback as 100% valid, just like any other human it's possible Lauda did mistakes and gave negative feedback for false reasons. For me who is relative new to the forums and I don't know Lauda well, I feel that the fact he/she is was removed from the DT list is an extra factor which supports the above claim.