Like the title says, once we hit that faithful day which we pass on what do you think will happen to your online stuff like forums, user counts, facebook page, ect?
They be left online until my web hosting gives up on trying to contact me to pay the hosting bills, and my roommate, future wife (assuming I get married before I die), relative, or room mate who answer the phone will tell them I passed on.
I read Facebook is thinking about disabling dead users account, and make it a Tribute page for the dead persons life. I'm guesing Twitter, and many other Social networks are thinking of it too.