Honestly the staff team needs to come up with strong and fair rules about trust system to get a sticky thread on rep board, and there will be no need to moderate or enforce it, there are some good DT members out there that can remind any abusers about their wrong doings.
You know very well that the trust system on the forum is not the competence of moderators. That is, the trust system is not moderated. DT members themselves must ensure that the trust system is used correctly. There is a topic where the basic provisions for using the trust system are described. Therefore, using the trust system for entries regarding forum rules, particularly plagiarism is wrong.