The Piece of Plastic With More Legal Power Than You Think: Inside the Do-Not-Disturb Sign's Quiet Rise
It hangs on millions of hotel doorknobs every night, a flimsy rectangle of plastic or cardboard most guests never think twice about. But the do-not-disturb sign carries a surprisingly tangled history — one that runs from postwar hospitality etiquette to modern courtrooms where it has decided cases of privacy, liability, and even criminal investigation.