I think some people from the default trust list should add negative feedback until he pays the $100 bet he made (and clearly lost).
Yes, I'd like to be able to add a negative feedback to his profile since he has soiled my topic and did not apologize. Furthermore, the posted disinformation could mislead a lot of people.
You cant leave negative feedback for no reason. People get "scamer tag" for that! I could report you to a moderator. You have multiple accounts and are trying to scam people.