I wouldn't be surprised if they're posted by Canadians.
I've seen confederate flags in Canada whose owner is still trying to claim that it's about heritage, and not the symbol of government founded on racism. That argument never holds water, but even less so when no one in your family has left the Canadian prairies in 100 years.
I've also run into Canadians who can explain the three branches of the American government, but doesn't know the difference between an MP, a PM, and an MLA.