Back in 1997, I was playing a character on the old TrekMoo, when the Q (the admins) were in the process of moving to new servers. They decided to all scorched universe on the remaining players and I have to say, that was a heck of lot of fun. The Borg invaded, the Romulans and Klingons got their ass kicked and we intrepid few in the federation were forced to make some tough choices that included sacrificing our ship. It was a small community of text based adventurers, but the collaborative effort made it a hell of a lot of fun.
I'm surprised there aren't more scorched earth games, where we build up communities just to have them torn down. I hope the loyal players of playing Tabula Rasa get to have the same kind of experience. I know it influenced me as to what good collaborative theaterical improvisation was all about.