Penalty for Disconcertion . . . by Whom?

[Raymond]

Originally Posted by Freddy

NFHS 9-1-3 After the ball is placed at the disposal of a free thrower:
c. No opponent shall disconcert the free thrower.

By rule, is it correct, however, that the penalty for disconcertion, when it is merited, may differ, depending on the disconcerter(s)?
Consider: if the opponent doing the disconcerting is a player on the floor, then the consequence is a violation (9-1-PENALTIES-2-a,b).
However, if the opponent(s) doing the disconcerting is bench personnel, must that be a T for unsporting conduct, and not a violation?

At the heart of the matter is this: by rule, can a violation ever be called on a non-player?

(Real situation from the last day of a camp today)

What exactly did the bench personnel do?