That would be the illegal stuff, I think. We're dealing with that on a societal basis. I suppose the extent depends on the trust we place into the ability of citizens to not collectively fall for something just by being exposed. If we all had very frail immune systems, doing our very best to extinguish the common cold would make sense. Since we don't, let's keep those reasonably safe that are in danger and let the rest deal with it.

For anything else, it may quickly become problematic if those that get scared or upset the most over news stories are in charge of declaring when to quarantine people, neighborhoods or states.