The consumer never agreed to those contracts. He bought the goods in the US, and imported them into Canada, via a VPN. He could just as well have driven across the border, bought a DVD, and carried it back.
The only "control" here is that it's assumed you don't have a copy of the DVD spec and don't realize what the lock consists of. Ignoring it suffices to bypass it.
then why is bell canada whining about VPNs, if they're normal and accepted?