You can sue anyone for anything anywhere, but I cannot imagine the Canadian police being interested in a citizen doing something lawful in Canada if the California (or wherever) cops call to complain be broke a Californian law.

And I can even less imagine a civil action demanding damages or court actions in Canada for doing something legal there. It would be like a Saudi company suing a US driving school that teaches women.

I don't think there's a there there as far as liability or worry. IANAL, of course.