We do have a variety of problems with internet freedom in Canada, but it's not just children that the article mentions. It's about identifying high risk individuals in general. The article also talks about potential minority bias which is something worth considering—not as a justification for anything or with any particular implication, just worth thinking about—in that in certain areas indigenous young women are going missing and are often never found or are found dead and it's a tough problem. Hugely complicated though and you can't use any particular issue to justify mass surveillance because the consequences could be immense.