Unfortunately, not much can be done, because trust aren't moderated on Bitcointalk.
But trust spam is moderated. It's a pure spam and should be cleaned such feedback. I wish theymos gives a little attention to it. OP can pm theymos or wait for an answer from some more experienced persons.
Trust spam isn't allowed. If I see anyone posting dozens of fake trust ratings (from one account or many alt accounts), I will delete all of their ratings