Not to start a competition with you, Max. But on this side of the border there are quite a few horror stories as well.This month Mathew Harvey was excluded from entering the US for life for answering truthfully when the U.S. Customs and Border Protection service asked if he had ever smoked pot recreationally.
"They said that I was inadmissible because I admitted to smoking marijuana after the age of 18."
For the rest of his life, Harvey and other Canadians in his position must now apply for advance permission to enter the U.S. as a non-immigrant. The travel waiver, which costs $585 US ($752 Cdn), is granted on a discretionary basis, which means it may be good for a year, or two, or five, depending on the discretion of the approval officer.
I suspect if Canada CBSA reciprocates and US citizens are truthful we will have very few US citizens crossing the border into Canada!.
Max.