Originally Posted by BPC

I think your facts are incorrect.

The standard procedure - whether it is a flight championship at the local club or a PGA Tour event - is players keep track of both their own scores AND their opponents.

The bottom portion of the card (where you keep your opponents score) is perforated. At the conclusion of the round, you tear that off and exchange it with your playing partner. Then everyone verifies each others score.

What HAS changed since the days of Roberto's tragedy is players now go to a trailer or scoring tent in a roped off area. Back in April 1968 there was a bit of rushed confusion which may have contributed to the unfortunate error.

Mr. De Vicenzo never placed blame on anyone but himself, though. He merely declared "What a stupid I am", but never once did he make any excuses. Very classy gentleman. Ironic he is remembered for a rules mishap, as his integrity is impeccable.