If you want to write something down, and not make it posted to others, why not use notepad on your system or some other similar method? Anything you post on here or any messaging system is posted in a MySQL database, with whoever that has access to it can read anything purely "private" anyway. Writing it down in notepad and offline will make sure noone else can read it. I don't think there is a big expectation of privacy with anything run by someone else on the internet.
The mods here probably have a good sense of us with expectations of privacy, but no offense to the mods I wouldn't trust them with that. If you want to write something truly private, you can't really rely on someone else to keep it that way.
Of course you could move the old-fashioned paper journal, that way even haxxors can't read it. Plus that method of journaling has wireless access anywhere.
