I have a houseful of teens. Polite way to ask them to stop pillaging the fridge?

King Char is right-put your kids in charge of the food---ign a cabinet and some of the fridge items for snacking---tell them what's off limits and if they are not sure they have to ask first! I f your kids can't handle that--serve them a few cheeseless pizzas for dinner--then they'll get the idea!