I agree with you, I would put him in my ignore list if his beef was solely with me, but he's against the whole forum, newbies and legendaries included, it doesn't matter who they are. The reason for the negative trust is because not only he's malicious, but he's throwing false allegations about other users, with zero evidence, which as @goldkingcoiner already mentioned, can put someone in financial risk. I was red-trusted for not aligning with with his views on the economical board, even though he's not in DT, it's still wrong and doesn't make sense. In return, I gave him a neutral feedback for his "revenge" tag, not a negative, which I changed when he started calling me account farmer, without a single evidence of that. This behaviour, in my opinion, accounts for a negative feedback, because he evidently shows that you cannot trust to deal with this user.

If another DT member, such as @goldkingcoiner, @lovemayfamilis, etc. etc. thinks it's an abuse of the trust system, I'll change it back to neutral. I explained however why my original neutral feedback was changed into negative.