Some home invasions are for sure getting close to what might be called flash-mob behavior. But I specifically mean the social-media posting of a house address that has just been invaded. Clockwork Orange style, but calling in 20 or so more participants, with even more mob-emboldened bad behaviour. I think we’ll see that soon. It could happen to a rural/wealthy family that is followed back from a shopping trip. In that case, seclusion would work in favor of the invaders, who might stay for hours or days, depending on the state of communications, law enforcement collapse, etc. This was seen in Argentina and elsewhere in recent times. Not the flash-mob reinforcements, but the secluded property invasion and prolonged torture, to wring out the hiding place of every possible valuable. In our case, it would also include a racial hatred dynamic that would result in spectacular evil.
That is truly frightening. The continuing breakdown in law and order was predicted in the book The Sovereign Individual. The larger powers, such as nation states, are no longer able to maintain their control of people, and smaller groups are now able to use force with impunity.
The future looks pretty chaotic to me. We might end up living in city states surrounded by moats. Who knows?