Freedom of expression in Canada is protected as a "fundamental freedom" by Section 2 of the Canadian Charter of Rights and Freedoms. The Charter also permits the government to enforce "reasonable" limits. Hate speech, obscenity, and defamation are common categories of restricted speech in Canada. During the 1970 October Crisis, the War Measures Act was used to limit speech from the militant political opposition.

I guess they need to add "Highway Cheering" along with "Hate Speech" and "Defimation", eh?

https://en.wikipedia.org/wiki/Freedom_of_expression_in_Canada