He was assessed the penalty according to the current rules. He knew the rule and he used it. A loophole, yup. So change the rule. You can’t change the penalty because you don’t like it. Again, change the rule. And you can bet they will.
On the flip side, it was pretty classless.
________________
Yeh, I would have let it roll about 50 feet further off the green .... then swatted it as it was moving.
LOL