Even if there would be a majority of nodes willing to reject mined blocks with such transactions, they are not able to recognize them.
Discussion
That's why I'm asking. Because there's more than one way to skin a cat.
Even after the fact would be effective against the biggest cheaters.
Specifically, those with the most hash rate, and most likely to cheat.
The consequences would not be worth it. Especially after the fact..🤔