I haven't read the whole thread, but have we definitively answered whether pressing your club into the grass behind ball, but not causing the ball to move, is a violation of the rules?
Here is the USGA’s interpretation:
8.1b/1 – Meaning of “Ground the Club Lightly”
Rule 8.1b allows a player to ground the club lightly directly in front of or behind the ball, even if that improves his or her lie or area of intended swing.
“Ground the club lightly” means allowing the weight of the club to be supported by the grass, soil, sand or other material on or above the ground surface.
But the player gets the penalty under Rule 8.1a if he or she improves the lie or area of intended swing by pressing the club down more than lightly.
I guess it comes down to a subjective determination of the meaning of “pressing the club down more than lightly.” I know how I come down on the example at hand.