Just wondering, are Mods/SMods/GAs allowed to view PM's? Like they are able to see what we type when you do /pm <name> <message>. Same goes for forums PM's. There are plug-ins that allow this. But, this is concerning a user's privacy. The reason I say that is because I know you do not discuss plug-ins, but this is rather a question of privacy. If you are unable/ not allowed to answer the question, I understand.
I'm not sure if mods can view pm in-game but every command and all chat shows up on the console and is recorded in the log. If you have to message something private to someone I would suggest avoiding using minecraft to do so.
It's more of a curiosity than a concern. I know everything can be viewed by the console. If they can check PM's, I wouldn't really mind. I have nothing to hide.
I believe that this plug-in is indeed used and only [Game Admin]+ may view this. Correct me if im wrong but that would be the most logical situation.