Curious how that type of coercion would be manifest. Logistically the regulators would need an automated mechanism in place to evaluate transactions going into each block. Then respond quick enough to...
So maybe they would put the onus on the regulated miner to police transactions, knowing that punishment could come later. Tax implications, fines, jail time. And the list of unallowable transactions would be forever changing and near impossible to keep current and “correct”, whatever that even means in this context.