Yes, the point is to detect hotspots early and effectively isolate them.

But how are we going to effectively isolate people? More, if it is in a young community, do we care?

That is, we do not have data showing this is deadly for pretty much why identifiable group, other than elderly. Such that no matter where a flare up is, we need to isolate the elderly.

My fireworks quip was that if a spark gets in there, the whole thing blows. But, large parts of the city could likely take a flare up and not notice. That is, the whole city is not a firework store. Right?

It's going to be interesting to see how the mix of competence and luck plays out over the next nine months.

Evil dictator idea. App on peoples smartphones that collects the number of unique close contacts and rebroadcasts that. So then people get warned that someones a risk.