Ok, so here is my idea.
Every been in a big fight/war at NAM with your clan/gang, and you accidently take like 60hp of your friend by accident?
It doesn't happen too much, but it can be annoying when you are trying not to hit your clan mates when having a big fight, you cant really fight with your full 110%.
So, i have a simple idea. You etheir love it or hate it.
Friend fire in gangs are turned off, so if you accidently hit your clan mate/gang mate/friend whatever, NO damage is done whatsoever.
Advantages: You don't have to worry about hitting your friend(s)
Disadvantages: Making the script, and also, People could find bugs.. abuse it, get wrongfully banned for health hacking.. something like that might start to occur.
You could use part of the script and modify it that you used when you kill a gang member with a bounty, and you DONT get the bounty.
Instead of not getting the money, they dont get any damage done.