Adrian, you debate well. You've done a lot of research on this topic, as evidenced by the numerous postings and hard line stance that you've taken against MFI and Ancestry. (Yes, I've read all postings in this thread)
Consider...Ancestry is operating from the State of Utah in the United States and does so under the prevailing laws of both governing bodies.
If an individual subscriber from, say, China, England, South Africa, Russia, Canada, Viet Nam, Korea, etc., has chosen to do business with Ancestry, their own LOCAL laws do not apply. Ancestry is NOT doing business in foreign countries (like Ontario CAN), those folks are doing business in the U.S., and U.S. and State laws govern how they operate.
Likewise, if we in the U.S. choose to do business with firms in foreign countries, we have to do so with the framework of their laws.