I would say an exclusion is more than enough based on how you perceive their judgement, but if you stick solely with Default trust then I can understand not deviating from that.
Nah, I don't do that exclusion/inclusion thingy. That's what I believe would be best in this situation, as you clearly want to leave the feedback.
Actually, I should have done what TECSHARE suggested:It's entirely legitimate to give someone a new positive rating just to negate a negative rating. (In this case you should explicitly respond to the negative rating you're negating.) It is not legitimate to keep deleting and reposting negative ratings to put the system back into "this guy just turned scammer!" mode. People who do that shouldn't be trusted.
Great. Now if only Lauda and Vod would follow suit, that would be great. I am not holding my breath though.
It is not really great, I think your trolling is very dangerous. Over and out.