The problem there is that most stores no longer grind and package their own meat, most of them get it shipped from industrial sized processing plants and therein lies the problem, in my opinion.

Food, especially meat, and industrialization are terms that should not be used together. It is extremely difficult to avoid cross contamination when you have tons of meat passing through complex machinery, evidence the outbreak of listeriosis at the Maple Leaf processing plant a year or so ago. It took them ages and several disassemblies to finally decontaminate the machinery.