I know this is a little politically incorrect an opinion for HN: While there are definitely people with underlying issues (drugs, poverty, mental health), many people are simply narcissistic jerks by nature, for no real reason. Asking nicely and pleading for them to behave will not work, nor will shaming misbehavior. Jerks respond only to incentives and disincentives.

Without enforcement, all these "orders" about distancing and sheltering in place and not hoarding are just going to be ignored by the jerks, like any rule without enforcement.