So far, I don't think we're in too much trouble, from what I've been reading. Here's a story on this same topic from CBC. It sounds like it's difficult for Netflix to defeat VPN, DNS, and proxy services. And they don't seem to care enough to put a lot of effort into fighting it. Besides, those customers are still paying customers. They're just customers that are accessing additional content from other countries. If didn't have access to that content, then maybe they wouldn't subscribe at all. The Canadian Netflix library really isn't that great.
I wrote about Unblock-US last year, and I haven't heard about any issues with their service, either. I wouldn't worry.