PreGame Rim Grasp and Pull

[rekent]

I know dunking pre-game is an unsporting technical, and I know that during the game grabbing the rim for a reason other than to prevent injury is a technical, but what about grabbing the rim and pulling it down pre-game? (Player doesn't have ball and pulls/hangs hard enough that backboard shakes quite a while)

I quickly went through the rule book and did not find anything addressing it, but a having a brain fart and may very well be missing it.