I got treated to the best bug this morning!
I logged out last night, closed down the client; everything was normal. The D was mildly busy when I left.
Logged back in this morning - my friends list is /exactly/ as I left it last night. The D is populated by the same people that were on when I left. Now I know it was a glitch, as Pidgin showed no one being online my friends list in game and I know quite a few them definitely weren't in the game, they were at work! (I had two that were on like Pidgin/Trillian) I switched characters to someone that I hadn't had on in two days to see if that cleared it - nope, same pocket D.
Had a friend log in while I was exploring my ghost town. He shows up on my list, but I can't send him tells, interact with him, etc. I can see when he logs in and out, however I even tried sending him a message through Pidgin and nothing.
I feel like I'm in that Futurama episode, you know, the last one where the world stood still?