Another difference is Canada has a long undefended border with the US and the citizens for both countries can look and sound the same. That guerrilla war wouldn't stay in just Canada.
groupofcrows
When discussing marriage with my girlfriend (now wife), she mentioned not wanting to change her name. I told her this wasn't acceptable - I expected her to change her name. But she repeated not wanting to change her last name. I told her she misunderstood, I didn't want her to change her last name, I wanted her to change her first name to "groupofcrows property", she can keep her last name. She did not accept this. (Yes this was a real conversation, yes we have been married for 7 years, no she did not change her name)
Someone has a pin or thumb tack held between there fingers. They touch 10 green apples but only pierce 3. How are you going to determine this person did that from the hundreds of customers who were at that spot during one day? How many hours of videos are being kept? How many cameras do you need? How much will this cost? What if this was done at the farm? Or truck or distribution center?
The supply chain goes from the source to the consumer. It doesn't have to be and elaborate and expensive operation to have an effect. Several unrelated individuals poke 1 or 2 tiny holes into some fruits and vegetables during their weekly grocery shopping. Once people start to notice there will be panic about food security. Most people won't care but enough will that it will cost grocery stores money in unsellable products and increased vigilance. Prices go up. If you can't trust your fellow human to not sneeze at the buffet table, how are you going to trust your neighbour/worker who lost x relatives to not tamper with your ice cream in the unlocked fridge at the store.
The American version of the "Great Leap Forward".