Better yet -- turn the convenience store into a bookstore. You'd never see those @ssholes within a mile of the place.
*Forget about shooting these hoodlums. The best way to stop this is to include an assortment of food laced with cyanide or some other deadly poison on the shelves — with some kind of inconspicuous markings on them so the store owner will know not to sell them to legitimate customers. *
VERY COOL!