And yet I had a good friend who lived and was raised in Canada, but since the closest hospital was a mile by sea, was born in the US. The RCMP and US police (can't remember which service) showed up at our University dorm and hauled away for not registering for the draft. It didn't matter that he was a student at a University, and that he had never been sent a draft notice, he was required to register. He ended up having to leave university and did a 2 year stint in Vietnam before being able to return to Canada. So, I have no idea how those draft dodgers were allowed to stay, however most established businesses and have done very well financially.
Ed