DT members are moderators of trust system. they say that trust is not moderated but DT members are moderating it individually without following any common rule, guideline.

Default trust ratings shouldn't rely on individual opinions, that would be the definition of moderating the trust system directly. administration has given the absolute power to DT members and they wouldn't care if DT members are using their power as a personal tool to dictate their own agendas.

What would happen to a DT2 member if they bully others and if they abuse their power? nothing would happen not unless somebody in a position of power steps in. but somebody in a position of power is not doing anything about it, so DT2 members would think that what they are doing is right.
They will continue to operate like this and nobody would stop them, because nobody actually cares.

About this case: Vod should tag you for bidding on your own auction and not because he doesn't trust you. did you bid on your auction with your main account? who does that anyways?