A lot more in Canada than the US. Write to your MP, and encourage others to do the same. Relate this to C-51 or whatever that horrible security bill is that everyone's protesting.
I may, but the Canadian political landscape right now is one where the ruling party has a majority so they can push through pretty much any bill they want. Also the party has pretty much discouraged MPs from expressing any opinions counter to the party line.
I did that at the proposed copyright extension in the UK a few years ago. The reply from my local MP was along the lines of "our party believes this" (that the copyright extension was justified), and you are in our constituency.
I replied explaining that I believed representative democracy was supposed to work the opposite way and they were supposed to represent me. I doubt very much if that made a difference.