I play rotationally, and have often noticed the unplayed households gaining or losing weight, but I'm perfectly fine with it. As much as I'm a control freak about certain things, it adds a bit of realism and makes the world feel more alive. I don't need every sim in my world to be fit; that would be weird. There are only a few sims who I want to stay around their setpoint because I specifically made them to be either larger or smaller than average; for those few, it's easy enough to use fulleditmode to adjust the sliders back to their starting point, and only takes a few seconds. Otherwise, if one of my sims gets a bit chubby, why would I care? It's hardly the end of the world.
