Slapping the Backboard

[Troward]

I usually cover this scenario in pre-game because the slapping of the backboard to "draw attention" seems to be happening a lot in my league. Where there is frequently disagreement with some of my partners is over the criteria for defining "draw attention". A common thing I hear is, the slap should be a no call unless the rim is shaking. The rationale being that it is the shaking rim that draws the attention of everyone not the noise of the slap, which is all to common a noise. How do others on the board define "drawing attention"? must the basket be shaking?

thanks
GTW