Why Is There An Ashtray In Airplane Lavatories?

It has been decades since smoking has been allowed on airplanes, so why are there ashtrays in any airplane lavatory I visit?  The reason isn't because the airplane is old and the ashtrays a product of a bye gon...

How To Open A Locked Airplane Lavatory

Many years ago I was flying from my home airport of Pittsburgh to Houston, Texas on board an ExpressJet Embraer 145.  I had a bit too much coffee and water while waiting for the flight, and figured I would use ...