Canada has plenty I’m sure - as evidenced by past catches at the border. There are also likely some indigenous Calypso Louie types hanging out in Canada. Given that Canada let this guy into Canada is clearly evidence that border security into Canada is less than perfect.
Sure, Canadian border security is less than perfect. But when a US citizen presents himself at the border for entry and there are no wants, no warrants, no warnings, chances are he gets in. You would want it some other way?