Some US cabin crew were arrested years ago after selling many of those tiny bottles for a nice profit in a major upper midwestern city.
Another major mistake was when they decided to use their illegal profits to buy a boat.
Another stupid employee decided to sell some buddy passes, which allowed friends to finally fly alone (no longer needing to fly with the companion), on E-Bay. The airline, in its typical wisdom, then revoked this privilege for any other buddies of the airlines' employees. The buddy and companion passes had only existed for a few years until some Einstein realized how smart he was.