Dead bodies may be moved, again so long as there is no danger of injury. A deadwalk is a mutual agreement among live players to stop fighting long enough to allow dead people to leave. Even if you did not hear the call for a deadwalk, it still applies. The previous all apply only if there are other players in the area. If there is a clear path from the dead person to ressurection, then the dead may simply walk.
Dead players tell no tales.
If you are dead, make every effort to not give away the locations of live players. Dead players should also avoid combats, as it is considered rude. Once you have left the immediate area of combat, you may make any path to the ressurrection site, making it clear to any live people you see that you are dead. Once you have reached the ressurrection site, you can put your headband back on. You are now alive again.