and neither do you.
First of all, the proposed law has not even been passed yet.
Once it is passed, if it passes, will it pass muster with the Canadian Supreme Court? Hard to tell. The Canadian Constitution, and the Supreme Court's interpretation of it (which I have studied a bit in grad school, by the way), is very, very big individual freedom (hence the reason the original law was struck down).
Will the law, if passed, apply to P411? Who knows? No one right now, not even legal scholars.
But even if the law does pass, I'm really not that worried. Let's take the worst case scenario, and say that Canadian LE decides that P411 is illegal, and the website goes down. What are the consequences? The most I can figure is that providers will lose a good screening and advertising resource, and hobbyists will lose a $129 membership fee and okays. And then I bet P411 (or some other version of it) pops up again, with servers in Costa Rica this time.
Am I concerned that Canadian LE is going to hand over all of the data to US LE? Nope. Being a member of a website is not illegal, and if US LE wants to bust us that badly, they can easily do so using their internet spying capabilities right now. When a previously very popular escort advertising and review site was busted by the Feds in 2010 (or 2011?), the feds got all of the member info then too. And yet I never heard of anyone being contacted by the fed as a result (other than the owners of the website).
So I think we should just relax and wait and see what happens. There are FAR too many unknowns at this point to get too worked up about it.