One of the ideas in this game is to be different from other games in the way it is structured. The arm bands or maybe a halo glow effect on grouped people works for me. Yeah tags above the head is what we are used to but this is a new game and thus new ideas are what will make it great. Same stuff over and over just gets boring. I have seen this type of thing completely change the original design from what the creator envisioned. This is your game Josh, do it the way you envisioned it. If you go with what everyone wants because it is the norm then it will not become the great game that was different in concept from others. I understand giving the users some leeway in requesting somethings but you have stated this was one thing you wanted to do different from other games so go with that idea. Personally I think a different type group 'tag' will just make the game more interesting to play as it will make you have to be a bit more diligent in watching what your shooting at.