I do not think this is a good use of the feedback system. May be a neutral would be perfect from JollyGood, negative is too harsh here. He should remove the tag. Did you PM him to respond here?
A method to neutralize wrong feedback already exists: "~". There is no need to invent anything new. There is definitely no need to motivate DT1 members with merit.
I think it is not that as easy as you said. I have Lauda in my trust list while Lauda gave me a wrong feedback. Due to Lauda's feedback sending history which is good for everyone and for me too while trading, I did not remove Lauda from my trust list.