...because you are doing something shady (selling trust is considered shady) then they are completely within their rights to remove you from default trust...
Interesting. So you're saying that selling Trust is shady and might get me kicked from default trust, but selling an account with green trust is ...not shady?
The difference being?
I didn't say that. You could be kicked from default trust for saying "hello" too much. Its completely up to whoever trusted you in the first place. As you have said, there is no rule saying you can't sell trust, there is also no rule saying you can't give inaccurate feedback. There are no rules to the trust system at all, the community makes up the guidelines, and selling trust is generally frowned upon. ...
And yet... default trust members are selling with one hand and neg repping with the other, creating demand for more trusted accounts.