The general way this gets solved is to disallow dead players from seeing anything that alive players cannot see. This is how popular games like CounterStrike wo

The general way this gets solved is to disallow dead players from seeing anything that alive players cannot see. This is how popular games like CounterStrike work, even with the in-game chat. An old anecdote... Back in the day, in SOCOM 2 for the PS2 (5v5 slow paced shooter), there were "alive" and "dead" chats for the players on each team. The dead players could look at alive players in the 3rd person, but pan the camera to always watch their back instead of what they were typically watching. Dead Players found that they might spot something that alive players didn't notice behind them, so one of the dead men would go into the menu and vote to kick the alive player. The alive player then saw this notification, and knew to check their back. So future games made sure dead people's POV cameras === alive players, ideally. Then dead people can talk and there's no trouble with messaging or skyping outside the game or anything.