The issue I've run into lately is when someone puts something in to microwave and wanders off, so when their food is done heating/cooking, they aren't around. I'm sure that's not what iFett was talking about (when people stop your food because you aren't guarding it), but its annoying that apparently your time is more valuable and you don't have to be considerate, or that you are ok with other people touching your food (kinda gross).