It was definitely a crazy tournament!
While I don't think DJ caused the movement (which looked like one dimple length), I also see the USGA's quandary.
The way the wording is, that if you can't determine something else had moved the ball then by default you are deemed to have caused it whether you've 'grounded' your club or not.
In all honesty, it is entirely possible that when he took his practice strokes (very close to the ball) he may have created enough air turbulence to make a ball that was just sitting precariously on a tuft of small grass (too small to see) to move ever-so-slightly a dimple length.
Although I'm no huge DJ fan and I don't think he's the sharpest knife in the drawer, the way the USGA handled the whole thing was pure amateurish at best.
Telling him
7 holes later that he
"might" be assessed a 1 stroke penalty (if a rules official hadn't told him to play it, it would have been two strokes) would have gotten into the head of ANY golfer.
Well,
almost any.
This is where I actually think of all the top players, having this happen to DJ was probably fortunate for the USGA. I say this because of my earlier comment that he's not all that bright and it probably didn't bother him that much, because he was focusing on each shot and he didn't have time (or the capacity) to think about more than one thing at a time.
Now if it had happened to that whiny little brat Bubba, we may have witnessed the first absolute and total meltdown of a golfer live on television.
But of all the golfers who have had to bear adversity and still keep plugging, DJ is at the top of my list. From grounding in a bunker that he didn't realize was a bunker in the PGA at Whistling Straights, to three putting from 12 feet in last years U.S. Open at Chambers Bay...this dude has had more travails than any other three players combined that I can think of.
So in the end, I was off my chair screaming
"YES" when he birdied the last hole and made it all moot.
If it were me, I would have waited for the camera's to be around, find the nearest USGA official and told them to
"stick the one stroke penalty up your azz!" 
So here's to you DJ, you've more than earned it!
