But that's like... motivation to make sure you're safe when you log out, and the point of the game is to build a base... It also completely prevents logging out during a fight.
It's an interesting concept but honestly I really don't care for it. If it was like a temporary thing where your body was only there for a few minutes that'd be fine. That being said, not everyone can play as much as someone else and this game is already pretty bad about giving an advantage to people who have more time to play.
People have jobs, school, and other things in their lives and they shouldn't have to put those on hold for Rust. That'd just be silly. Sleepers has many more cons than it does pros. If your internet goes out while you are playing you could be found and killed. Same for if the server goes down while playing and when you come back a little later someone got on before you and found you. It's literally more of a frustration than anything.