Kicking ball

[DownTownTonyBrown]

Yes, I see it called incorrectly quite often myself. I don't have my rule book with me for reference but intent is part of the rule; below the knee is another part.

The defense must be moving their feet to stop a pass (intent); the thrown ball must also make contact with the lower part of the leg beginning at the knee.

A pass that simply hits below the knee is not enough - the leg must be moving in an intentional act of defense otherwise it is just a bad pass (and the offense should not be rewarded by returning the ball to them.)

Why it is called wrong has got to be a lack of education or understanding of the rule. But then, dependent upon your viewpoint, we call a lot of things wrong.