What about dealing with the first offence? Head and shoulders below hips! If we didn't allow that to happen the crocodile roll wouldn't be required???
You are talking about 16.2(a) right?
[LAWS]16.2 (a) All players forming, joining or taking part in a ruck must have their heads and shoulders no lower than their hips.
Sanction: Free Kick [/LAWS]
Well, that is a Ruck Law. It doesn't apply to the first arriving player at a tackle, the jackler, so he cannot be FK just for being in that position.
You could argue that the moment an opponent grabs him, its a ruck, and he's now
"forming" and/or
"taking part" in the ruck and is liable to FK, but IMO that would be somewhat unfair. We insist that jacklers play the ball on their feet, unsupported, and since human arms are shorter than human legs, having head and shoulders above hips while grabbing a ball on the ground under those imposed conditions simply is not going to happen.
Also, for the overall playing of the game, this would make a breakdown turnover almost impossible to get, and we end up with no contesting of the breakdown, a precession of possession and defenders lining the trenchesl