Already happened/happening. I have an ex-coworker that left my current employer for my state's version of the FBI. Long story short, the government has a massiv

Already happened/happening. I have an ex-coworker that left my current employer for my state's version of the FBI. Long story short, the government has a massive database to crosscheck against. Often times, the would use automated processes to filter through suspicious data they would collect during arrests. If the automated process flags something as a potential hit, then they, the humans, would then review those images to verify. Every image/video that is discovered to be a hit is also inserted into a larger dataset as well. I can't remember if the Feds have their own DB (why wouldn't they?), but the National Center for Missing and Exploited Children run a database that I believe government agencies use too. Not to mention, companies like Dropbox, Google, etc.. all has against the database(s) as well.