I don’t care if freezing doesn’t kill the bugs. The flour will be used to cook something. It will go into a baked item or be used to coat something for frying. Now I am not saying we shouldn’t take precautions against infestation. What I am saying is there has to be a balance. At what cost (in money, time and effort) is it worth it to make something absolutely safe? Personally, I don’t want to lose focus.
Though its light weight and long shelf life are ideal for navigating harsh conditions, freeze-dried food is probably most famous as a cultural curiosity: Like many Americans, I discovered it in a museum gift shop, gawking at the styrofoam-like ice cream that astronauts used to have for dessert. More recently, I encountered it at a disaster preparedness convention in Raleigh, North Carolina, where smiling, gray-haired preppers manned tables piled with plastic bags full of vegetables, meats, and stews.