This happened here in Atlanta also:

More than 100 Apple Store customers are victims of follow-away burglaries in L.A. region

A group of thieves has been taking a big bite out of Apple Store customers by purloining computers in more than 100 "follow away" burglaries across the region, authorities said.

Last month, the Orange County district attorney's office charged three Los Angeles residents -- Garzon Diaz, Louis Lopez and John Rodriguez -- with burglary and grand theft in connection with 28 cases in which thieves broke into vehicles and stole computers from customers who had visited Apple retail stores.


http://latimesblogs.latim...egion.html

I didn't know what "follow away" meant. The article explained it:

The suspects sought by Manhattan Beach police had a specific method of operation, Brown said. They stake out an Apple store and choose their target. Then they follow their prospective victims when they drive to another shop or a parking spot near their home. If computers are left unattended inside the vehicle, the thieves strike.