Just do enough damage, then you can spectate or you can swap with each other. I do not know how much but just some hits should be enough. I was thinking that in 1 v 3 could be some situations that you struggle to get shots on your opponent or he she dominates too much. Can you get accidently punished?
Happend to me, when i just unequipped weapon for science. Struggled to land shots and even if did it was nothing.
I think it is a good method for afk punishment, it has its own flaws. Not ideal. But it my work well with punishment for lacking useful activity and then with actual afk punishment.