It would have been easy just to stick your foot out and trip that worthless pile of trash while he's running and make him do the faceplant, kick him in the face and keep him on the ground until the cops showed up.
Even if I were a customer I would have tried to at least trip the idiot, seriously hate thieves.
I agree with lavem and tflournoy, once you try to steal you are stripped of rights, if something bad happens to you, who cares? I don't, even if you get killed in the attempt, its really not society's problem.
why dont more people see things this way?