Giving someone negative trust for disagreeing with you sets a dangerous precedent and degrades the value of the trust system overall (especially if you are part of DefaultTrust)
The situation with WC has been unique to say the least, threads cluttered with alt accounts and shills. To say that Nubbins is tarnishing the reputation of honest users is a bit much. There has been some deceit from WC and Nubbins has tried to caution new/old customers to look closer at what they are actually purchasing. He has certainly been aggressive in his methods.
I think Nubbins should be educated on how his trust ratings are affecting users not confirmed to be scammers before being removed
Exactly. Negative feedback is if you think someone is a scammer, or that they are likely to scam. Negative feedback is not for "Use caution when trusting this user's judgement".
It is apparent that Nubbins does not understand how the trust system works or it's intended uses.
It would probably even be a good idea to make people pass some kind of test/quiz before "officially" being on default trust