You're babbling now.
His parents never "signed him up" for anything. Like US citizenship, Canadian citizenship simply IS at birth if specific requirements are met. It's apparently quite possible to have it and not even realize it. They weren't interested in acting on it, he wasn't interested in acting on it, and that was that. They reported the birth to the proper authorities, and moved on.
What difference does it make if he ever traveled to Canada or not? I've traveled to Mexico, but I'm pretty sure that has no relevance to my citizenship or eligibility to be President, should I ever be insane enough to run. And what the hell is "civic business"?
Civic business is like registering as a lobbyist... less formal meetings and trips are even more suspicious. He could be a spy. Literally and seriously. The Keystone alone is a multi-billion dollar Canadian interest contradicting our own. Canada's our pet country, but they still spy on us and have ambitions with our policy. That's why there's that provision in our constitution.
His parents registered his birth. There may have been a number of reasons to make your Canadian born American kid a full blown canuck: they may have registered him with the national health service. They may have had to do some of this if he attended school up there. Incidental stuff mom or dad did is excusable while they're living abroad, I think.
Why in the hell would Canada want or need to spy on us, even assuming Canada HAS spies (Sorry, but they don't appear to actually DO much on the international stage)?
You're wandering off into the land of speculation and outright delusion. All daydreams aside, Cruz and his parents never did anything about his technical dual citizenship. I would assume his birth WAS reported to the National Health Service, insofar as he was issued a certificate of birth from the Edmonton Department of Health. So what? Canada tracks birth statistics, same as every other industrialized nation on Earth.
He never attended school there. He was four when his family moved back to the States. You would know all of this if you would stop making up fevered fantasies and just look the information up. Dumbass.
Let me walk you through the timeline. His parents went to Canada on business. While there, his mother dropped a baby, presumably in a Canadian hospital. The kid was issued a birth certificate by the Division of Vital Statistics for the local Department of Health. His parents, as US citizens in a foreign country, also reported the birth of their child to the US Consulate. When their business in Canada was concluded - when Ted was four - they packed up and moved back to the US. Ted grew up in the US, got a US passport in high school, and no one in the family thought much about it until the Dallas News published an article about it. At that point, realizing that he still retained dual citizenship in Canada, Ted processed the necessary paperwork to renounce it.
The end.