Some people just use the Trust system as their personal scratchbook.
Honestly, it worries me whenever I see such. The reckless use of the trust system for vendetta and intimidation especially by high ranked members is worrisome. I've come across red tagged accounts whose alleged offences were for spam posting (not even plagiarism) but those who tagged them couldn't put references to the tags.
If you see users who incorrectly use the Trust system, you should consider excluding them from
your Trust list. I see you
haven't done that yet. The more people make a custom Trust list, the more decentralized it becomes.
See
LoyceV's Beginners guide to correct use of the Trust system.