The LA Daily News has an article this morning about the Valley Inn Restaurant being robbed by two masked robbers. Kevin at LA Observed notes that the robbery was "more aggressive than first described."
I am a big fan of hardening the target. When we talk about cars, we talk about not leaving your laptop in the front seat. When you get robbed at a restaurant, there is not much you can do because they know you were planning on paying for that dinner. So there goes your wallet.
But you can strip down your wallet. When I have late nights at Jerry's or Solley's Deli, I tend take excess credit cards and IDs out. It's a pain, but it will be much less of one when trying to cancel or recover stolen items.