I'd like to see any time you team hit that it tells you hit "this teammate" and possibly even tell how much damage or a general idea.
Half the time I'm team hit by a ranged class they don't even know they hit a friendly target. The only way they know is if they get reported, and honestly I hardly ever report anyone unless they were blatantly being reckless.
At least I didn't get a 500 lb bomb dropped on me from a friendly airplane, accident or not there's no walking away from that.