Earlier quoted context omitted.
The point is the app is not being used for ambushing and attacking police at all, because there have been no such ambushes in Hong Kong. The few situations where Hong Kong police have been in danger have come when a small group splits off and is isolated during a protest. In no case have protesters caught the police unawares in an ambush, let alone off-duty police. By its nature, the app shows large concentrations of…
This [1] is the video of the first shooting in the Hong Kong protests - reasonably safe for life for anybody who has not seen it. Something I didn't understand when I first saw the video is how the protesters were able to do what they do. An armed group of protesters moved rapidly towards their target, and manage to ambush him around a blind corner. Their target was a single police officer that seems to have temporar…
Or look at the video preceding this incident, and you'll see that the officers ran ahead of their group, and the kids confronting them were not looking at their phones because they were busy trying not to get shot.
Or come and see for yourself.
Or rely on the eyewitness testimony of hundreds of journalists in Hong Kong who have seen this same situation play out—cops run out too far, get isolated, get scared, draw a sidearm.
Or figure it out from first principles on a message board.