I like this idea as it helps ID what team a player is on whether you can see the arm band or not
I'd put those who put it on their ankle in this group too, no matter how they try to spin it that's trying to hide the armband and is cheating in my opinion. They're usually the loudest to start bitching when shot by friendly fire too
I do agree that it's a bit shitty to have one team using green while the other uses red, switching the green to blue would even things out