A point of clarification regarding the thread title: Canada is not doing anything. There is a lawsuit being brought in Canada, but the plaintiff is not Canada; it is 5 individuals, one or more of whom are Canadian citizens. They can bring a lawsuit, and it appears that it has met all the criteria for proceeding; whether it will do them any good is another story.
Based on the article, it seems that there's at least a reasonable expectation that the judgment will go in their favour, but what is the likelihood of their collecting damages? Slim to none, if you ask me -- and I think "Slim" just left the room. I'm guessing that all the benefit they'll get out of this action is publicity.