Stupidity: It's The Other Way Around Today

The lights are on, but no one's home. 

This expression -- meant to denote someone's stupidity -- was ubiquitous when I lived in the Anglo-world. I imagine it still is today. However, I don't think it really applies anymore. In fact, I think the inverted form of this expression represents the current state of the world far more accurately:

Someone's home, but the lights are out. 

Or, more even accurately:

Everyone's home and the light is on, but nearly everyone has blinded themselves to it.