+ Approximate matching. They might want to have images almost similar also to be flagged.
+ Scope creep. Particular images of people who are wanted or areas where they might live or shots of joints etc.
+ Mistakes. Accidentally flagging honest citizens and the bureaucracy that will follow. "Innocent until proven guilty..." That's not preemptively scanning someone's personal devices.
+ Approximate matching. They might want to have images almost similar also to be flagged. + Scope creep. Particular images of people who are wanted or areas where they might live or shots of joints etc. + Mistakes. Accidentally flagging honest citizens and the bureaucracy that will follow. "Innocent until proven guilty..." That's not preemptively scanning someone's personal devices.