You wouldn't find the definition of a DT member anywhere on Google, but to give you an idea, default trust members are users who are, by default, trusted by community members and don't have any ill-intention towards their co-members in a given community. Mainly, these people have done something good for the whole of the community that's why they're given such trust. And as I can see, the Pharmacist only leaves negative feedback on those who are scammers, shitposting and spreading FUD most of the time. You can PM him about it, though I doubt he'll reconsider your request unless he sees change.

Sorry to hear OP.  I jut got done responding to another person in a similar situation.  Community policing isn't a bad thing, but when someone takes it open them self to be the Paul Blart cause they are given a little "power" is silly.  Especially in the newbie section.  If you want to be critical of Jr/Sr members who are trying to raise their activity, I am all for that scrutiny.  Most newbies just want to become Jr so they can actively participate in campaigns.