if you play ball in kitchen after a scratch I would assume everybody knows this is a strategy that can be implemented by anybody playing at any point in the game....if you think you are going to miss, the goal at almost any point of the game is to miss and not leave your competition with much of a shot.....scratching is just another means of accomplishing this....unfortunately taking a shot with zero intention of actually making one of your own balls is a strategy that is used often.....if the intent is the same, some would argue whats the difference bewtween intentionally scratching, and intentionally leaving your opponent without a shot in some other way.....
I wouldn't do it though.....there is in most cases a way of accomplishing what you want to do without just hitting it straight into the pocket....