Victoria BC here. I've tried setting up POL to go through numerous open proxies across Canada, the US, and Japan, and none of them work. Don't see how that could happen unless POL actually ignores your proxy settings, and they only put them there as a joke.
Or, they have banned known proxy servers, which makes sense, since that's where DDOS attacks would be coming from I'd expect ;) In that case, since POL behaves exactly the same for Shaw as it does for proxies, they have probably banned Shaw as well.