Lakers bench would throw towels up in the air during free throws.

and you could see Celtics bench yelling in players ears that were shooting 3’s near their bench’s corner.

meh

The coach’s position may be on or off the bench from the 28’ hash mark to the baseline.They are permitted between the 28’ hash mark and the midcourt line to relay information to players but must return to the bench side of the 28’ hash mark immediately or be called for a non-unsportsmanlike technical foul.A coach is not permitted to cross the midcourt line and violators will be assessed an unsportsmanlike technical foul immediately. All assistants and trainers must remain on the bench. Coaches and trainers are not permitted to go to the scorer’s table, for any reason, except during a dead ball.

c. Any club personnel not seated on the bench must conduct themselves in a manner that would reflect favorably on the dignity of the game or that of the officials.Violations by any of the personnel indicated shall require a written report to the Basketball Operations Department for subsequent action.

free throws:

During all free throw attempts, no opponent in the game shall disconcert the shooter once the ball is placed at his disposal.The following are acts of disconcertion:
(1) raising his arms when positioned on the lane line on a free throw which will not remain in play,
(2) waving his arms or making a sudden movement when in the visual field of the shooter during any free throw attempt,
(3) talking to the free throw shooter or talking in a loud disruptive manner during any free throw attempt.

technical fouls:

A technical foul(s) may be assessed to any player on the court or anyone seated on the bench for conduct which, in the opinion of an official, is detrimental to the game

a knick player on the bench swiped his towel at hughes when he hit his three pointer…so is your point that because VDN is a coach he can’t bark at a player while attempting a shot?