if you can't handle an accidental team kill, then don't play this game. - rant
Got team killed in revenge twice in 2 different games in less than 10 mins. Sure, I effed up and shot a diver. It happens we all shoot and get shot. It's a flaming shotgun it's not easy to control and they were behind a bug.
You reinforce, apologize and move on for the mission. You do not revenge kill your fellow diver the moment you step out of your pod and then say it's my fault.
I've noticed that there really can be a real difference between the occasional oopsie teamkill, and someone who is either unskilled or careless. When it's just one guy in the group doing it, and he's racked up 5-7 accidentals, there does need to come a point where responsibility is taken.