To what extent can a user misinform or misrepresent facts relating to other users before a negative trust is given, and is a neutral warranted or a negative, if this is proven?
Is a better question if we want to add a little specificity to the topic.
There is a difference between lying to deceive (trade risk) and expressing an opinion. Everyone has the right to their opinion, even if it happens to be wrong or incorrect. Contrasting opinions should be addressed through reasoned discussions or by simply ignoring them, and this should take place within the context of regular forum conversation, rather than using the feedback system.
On this forum, we hold the principles of freedom of speech, or freedom of expression if you prefer, in high regard. Everyone has an equal right to express their thoughts as long as they adhere to the forum rules. If you believe someone is violating these rules, report them to the moderators for appropriate action. If you happen to disagree with someone's opinion, you can engage in a discussion or simply choose to ignore them. Disagreements are a natural part of any discussion platform, but trust ratings should not be part of the equation.
I view your use of the trust system as vindictive and driven by personal feelings because you didn't appreciate someone's opinion of you, and now you are trying to rationalize it.