*Not some of the countries. All of the countries have at least individuals doing crimes with involvement or help from Bitcoin. To answer your question if local exchanges have been required by the government then I won't be mad about it. It just makes the competition standard and equal. If the stock exchange requires brokers to identify their customers first they should also do it to the crypto market period. Identifying yourself as a user or trader would help the government as you are cooperating with their rules.
impossible to enforce on the wider crypto space though, surely people see this? Yes, it will happen on any legal entity/centralized exchange, because that is their world, they have jurisdiction over it. Standard and equal, sure... in which jurisdiction and for how much of the wider population? How can it be standardized and equal across the board (whether or not you think that is a good thing), when it is literally impossible to enforce except via centralised legal entities,,, all the innovation and excitement will simply remain in the open-source/decentralized elements and the centralized bits will always be playing catch up... stale and controlled.