No one cares what you trust or not. Without any concrete evidence you can not leave a negative feedback to an account. Let's see what your feedback starts with
How much more evidence does one need that dealing with Ratmetric would be high risk?
Petulant deleting of posts, rescinding sponsorship ("donation" LOL), removing trust ratings/inclusions/exclusions, name change, e-mail/password change, the list goes on and on. Not even talking about the verbal attacks on anyone who dares to mention him (freedom of speech FTW).
Alleged sale of the account is just one of many issues with this user. I can't blame anyone for adding red trust - there is enough stuff going on with it to call it "high risk".