AFAIK, this is a relatively new phenomenon at least in the Bay Area, where it's exploded recently. I was giving this some thought. In the last week or two it seems to have subsided a lot. Probably because the heat is on now.
The big wigs, gov. Gavin Newsom and mayor London Breed of S.F. have condemned these things vociferously and pledged effective action, which was followed by the subsidence. How much their anger and expressiveness is lip service I don't know.
Now, a related phenomenon these days around here is the catalytic converter theft rings. They busted a big one a few days ago, a dozen or more people and their photos and names were shown on the news in one big still shot. You could pause and study it (I did). There were all races and ages. Well, maybe some preponderances. Authorities are busting the shops that buy the CCs from the rings.
The mall thefts is a related thing. A lot of that merchandise is being fenced and there's a good chance that the events are coordinated/planned by whoever is fencing. Take down the fencers and you pinch off the snake's head.
Seems to me that a great way to stop this stuff is to infiltrate the same way the FBI infiltrates terrorist organizations' (and individuals') plots to kidnap, murder, blow things up, sabotage, etc. Online snooping is part of that. A lot of times an agent will gain the confidence of insiders and stop their executing their plans, make arrests, etc. This could work for the mass mall heists. Find out where and when an action will happen and show up with massive coordinated force, block escape routes for the perps and their cars, fill the paddy wagons. They've busted some people afterwards but advanced knowledge of events would snuff this stuff out.
An analogous activity in recent years is the side shows. Those have to be mostly coordinated online. Another one is the car break-ins, which have become epidemic in the region. Someone's fencing that stuff.