So I was poking around in the account page. I think I accidentally logged out, then pressed the Back button on my browser, and it loaded up a cached version of my account page, but I wasn't logged in. But when I clicked on Account Settings, I noticed it showed someone else's email address. Clicking on forum settings, it showed someone else's signature.
Someone with a signature and posting from:
80PLD/80WAR/80THF/75BLM/62BLU
Posting from Everywhere with Helicopter
I can't see who it is... but it's definitely not me.