Shop owners would just take notes on who buy what and let people go with the items.

Looting only ever happens when areas hve started being evacuated and most shop owners + law enforcement are elsewhere.

And then take it up the butt from the taxman once he finds out.

The "civism" was well noted in the Spanish case, as far as I know, the whole country passed this incident without a single case of security issue. During the whole thing, people were extremely kind and polite. People sitting in dark bars was kind of "funny" how people clinging to their normal lives even in emergencies.