Slapping the backboard

[Brad]

The spirit and intent of that rule is to penalize a player for drawing attention to him/herself or as a means of venting frustration.

I've never seen a player do this and in the cases where I have seen a technical called by officials the player was not "drawing attention to him/herself or as a means of venting frustration".

Not knowing whether a basket was good or not because you were focusing on whether or not to assess a technical foul for slapping the backboard is inexcusable. These types of technicals call themselves. If you have to think about whether or not the slap merits a technical foul or not, it doesn't.