It involved undercover police officers posing as teenaged escorts on a website they suspected of being a hub for the sexual exploitation of children.The ruling says that through investigations and interviews with dozens of underage sex workers, the York Regional Police learned that there was "a pervasive problem stemming from a particular type of online ad" on a subdirectory of Backpage.com and decided to target that website.The ruling said that the website appeared to be "an active hub of crime" and that specific posts advertising the youngest sex workers appeared there daily."If the [York Regional Police] were to address offences related to juvenile sex work, ads in the York Region escort subdirectory of Backpage for the youngest sex workers were places to do so."It said there was evidence to suggest children were being offered for abuse on more popular platforms such as Yahoo and Facebook and that broad investigations like Truong's could ensnare innocent Canadians, compromising their personal information."