Do you sleep with your TV going?/Help me explain this phenomenon?

Probably 90% of my hospital roommates over the years have left their TVs going, all. freaking. night. I am so puzzled by this because I have to think that 90% of people don’t sleep with their TVs going all night at home. But maybe I’m wrong – for statistical purposes, do you sleep with your TV on? What if you’re sleeping in a unfamiliar place? Would you do this if you were in the hospital, but not at home? Do you have any other ideas why this is so common?