free throw violation

[oc]

HS girls JV game last night--As L is about to bounce the ball to the free throw shooter I see B-5 standing ON the the three point line. I (T) blow whistle to stop my partner, motion to B-5 to back up and motion to my P to go ahead. To me this is just good game maneagement a no-brainer-except maybe I should have seen it a few seconds earlier.

Anybody disagree? Here is why I ask-HS V boys game a few weeks ago. I am the L about to pass the ball to the free throw shooter and see B-1's foot on the line. Before I pass the ball I point to the foot and B-1 backs it up. After the game assignor/evaluator says that would be fine in MS but on the HS level B-1 should know better and I just took an advantage away from team A.

What do you guys do? Does it depend on the level?