Flash mobs of robbers? Better get used to it and prepare for it; it's only going to get worse. This is not an isolated incident
in Chicago. The same thing is happening in DC, LA and will spread to other urban areas rather quickly. It's going to be hard to prevent at best or control at worst. Really! What do you do if you're in a store and 15 kids/adults/people run in the store and start grabbing merchandise and heading for the door? Are you really going to shoot one or more of them. As much as you might like to, I doubt that that is going to happen. More in-store security is going to have to be implemented, highly visible security. This is about the only way to deter such mob actions, and even then there's no guarantee it is going to stop or prevent such an invasion.
This is going to be a wide spread problem and it needs to be addressed now, not later. And if there is no direct threat to your life while such an event is happening, there is little you can do to help without getting yourself into legal problems.
Just another form of UGLY that is headed our way.