From the @SCC_eng: "In a free and democratic society, no one should accept — or expect to be subjected to — unjustified state intrusions. Interference with freedom of movement, just like invasion of privacy, must not be trivialized." https://twitter.com/cancivlib/status/1200664345367085056

"... the appellant was perfectly entitled to refuse to identify herself and then simply to walk away. Unless a statutory provision or common law rule clearly imposes it, there is no obligation to identify oneself to, or indeed to cooperate with, a police officer."

The troubling thing about this decision is that the people who are charged with enforcing the law are held to a lower standard of knowing the law than those who are supposed to follow it. And enforcing the law is about following the law about enforcement.