The proposal I have for when arty TK punishments are implemented is that it should function differently then infantry. It's extremely easy to cause the amount of team damage with artillery with one misplaced shot, just like it's possible to get one or maybe even two TKs accidentally in a round. My concern that if held to the same standard, you could see lot's of artillery crews getting banned left and right due to a single bad shot or bad call by the officer. Obviously there's a delicate balance between being forgiving to accidents and making sure trolls are stopped. Perhaps different team damage rules could apply on passworded servers?
Whatever the solution ends up becoming, I just wanted to voice the concern.