I’ve been flying for business every other month for the past few years, and every time I sit down on a plane, I look up and wonder why they haven’t swapped the overhead ‘no smoking’ lights with something more relevant (like “turn off electronic devices”), given that smoking has been verboten on flights for years.

Wouldn’t a few well-placed physical signs in the cabin do the same job as the existing “no smoking” lights? Or are the lights still FAA-mandated?