Secondly, the exchange could simply print the whole database and send them a shipping container with a million pages of orders, just for fun. They'd comply with the order in their own way and prank the greedy IRS.
Anyone with a financial interest or interaction anywhere brushes up against US influence eventually. It's impossible to avoid. Even if you totally blew them off, you'd be pretty suicidal to actively provoke them. Their job is to unearth reasons to go after you no matter where you are.
As for SEALS drilling you as you bought your frappucino in Kuala Lumpur, never say never.