In the light of "(next to) no rules of feedback left" I think its fine. People need to read the feedback, what it was given for and what feedback the person in question usually gives, etc. It might be a bit much to ask for such investigations for someone new, but the alternative is to read a possible 80+ pages thread or to moderate the trust system.
I am aware of the risks and I dont like them either, I just dont see it as an option to force people to understand the trust system in a certain way. This would require moderating it. The best course of action is probably to contact the person on DT that leaves these ratings and ask them consider the possible implications.