Haven't read the whole thread, so apologies if discussed, but I got chewed out by a Tour Pro one time for not concentrating my divots on the practice tee. Reminded of that this morning by the USGA turf newletter with an article on the same subject.
Believe me, once pointed out, I try to concentrate my divots for the benny of the super and other golfers. BTW, the correct way is to go front to back in a straight line, when you reach the back of the prescribed teeing area, start again a few inches over and do it again.