Except, that would never happen. I’m almost always with the main group PvPing… you would never see me with 0 damage / 0 healing 
So I ask you again, if I decided to just “stop trying”, but continued to PvP with the main group, how will you know? It’s fairly easy to “blend in” with a large deathball in epic bgs.
If I decided the game was already a loss, and decided to just “stop trying” (in my own discreet/creative ways) to avoid a deserter debuff, how will you stop me? 