Admins have the ability to see everything, including the information you mentioned. This ability is not automatic, so it would take intentional cheating on my part to access it. Everyone can rest easy knowing that I will never cheat, and I think The Saucepan Man can vouch for me, as he and I have played several games by E-mail that required complete trust in the integrity of the other player.
So, If I hang you, it won't be because I was going through your PMs. It will be because I had Mithadan go through your PMs and report their content to me.
Ha! Just kidding!