Firstly it should be pointed out that all the data that they have used in the past about how Canada is a haven for copyright infringement has been disproved. Multiple times. The numbers they use are largely made up, and have no real basis in reality. So them coming out again, with more of the same BS should be rightly ignored.
As the first point alludes, their reputation for bending "facts" as it suits them really isn't doing their cause or reputation any favors. In addition, in Canada they once had an ally in the Conservative party, who tasked a Minister to draft a set of laws to curtail copyright infringement in Canada. However, once release it became very transparent, and easily discoverable, that those laws were drafted by the RIAA/MPAA, verbatim. Word for word. It was a bit of irony that the laws themselves might be considered plagiarism. Once this became clear, it was all swept away, and interfering in a sovereign nations law creation process isn't going to win over a lot of fans (or voters to whom politicians might care about).
Just because the US legal system is in shambles, doesn't mean Canada's have to be also. We have stronger privacy laws in Canada, and I think most people of all political stripes are proud of that fact. Considering how the RIAA/MPAA does an end run around the US legal system by suing "John Doe's" by IP address, then having the court held in some crazy place like East Texas where companies vie for citizens appeal, who always rule in favor of these creeps who force the release of personal information, then they drop all of those cases, and re-try them using said personal information in other states of residence seems more than a bit absurd.
Finally, all that said, Canada has taken real action in the protection of copyright infringement. About the only "haven" that I was ever aware of was ISOHUNT (not including those imported Asian physical CAM DVD's which you can find someplace which are horrible, and really small fry). For whatever reason the guy who ran it had it located in BC. He fought the legal battle against the government for a long time (10 years maybe?), but eventually lost and was forced to shut down. Later it re-opened again, now being hosted in whoknowswhereistan like all the rest of the sites out there, but that is hardly Canada's fault.
So in summary the RIAA/MPAA can shove it.