Blackstone
Brigadier
Not quite, a lot of people (yes including old grannies) don't give a shit about verbal warnings, especially if there's the "mob mentality". There are also a lot of these incidents happening (truck rolls over, village people grab everything they can), so they probably don't even think it's against the law.
It's amazing there are no riots and looting in Japan after disasters. Great example for the rest of the world.