Betrayals shouldn't count as deaths

Now this thread isn't to support making halo no longer able to shoot a pal once, or getting rid of having to smartly throw nades so your team doesn't die. This is about when you're in breakout and haven't died, going for that immortal medal and your "funny" friend kills you, and you don't get it. This is about when you're 19-0 playing a great game and your other "funny" friend kills you, so you can't get the perfect (WHICH IS WAS TALKING ABOUT ALL FUCKING GAME SNAG). And if you say this is not a big deal it probably isn't to most but it is to me. And when it happens, it fucking blows. Games like COD have this in multiplayer, and it's much less infuriating. And this could be abused, but could work the better. Here's my idea. It still counts as a negative point towards there kills and your team, just doesn't stop you from an immortal or perfect.