Bad Backcourt Call by Partner. What to do?

[Judtech]

To be the jerk in the room....(J/k but just saying )
It seems to me you were ball watching. If you are in the L you would be the furthest from the play. I'd let it go until I had a chance to ask them about it later. And it can be done very easily at half/end of quarter or end of game. As you review your game just ask them what they had on the back court violation. Tell him, and he probably already knows, that the coach had a question about it and you didnt "have a good look".
NOW, if YOU were the T and THEY were the L and they blew a back court violation, I would be more prone to stop play and have a conversation with them. In fact have done so on a couple of occasions with "newbies". It does make a great teaching point on several levels. 1) As I stated earlier, I ask them why they were looking at the instead of the other 6-8 players on the floor. 2) Review what constitutes a back court violation and 3) although rare, admit that I probably made an error
Hope that didnt sound too jerky!!