Publishing a personal message is 100% acceptable. Unless explicitly agreed upon ahead of time, there should not be any expectation of confidentiality when sending a PM. This is regardless of who publishes the message so long as it is being done by someone sending or receiving the message.

In the majority of the US, wiretapping laws only require the consent of one party to a conversation for it to be recorded.

It appears that a lot of people have trouble telling the difference between the words personal and private.

---

On a separate note, the trust system is intended to be political in nature. Lobbying for particular inclusions or exclusions is expected.