Originally Posted by
WineCountryUA
Beside not be generally socially acceptable, the MEL requirements are not suggestions for the crew and have been approved by the FAA.
Absolutely correct... besides the fact in some jurisdictions that could actually be a crime especially if children are seated nearby.
Funny, there is a module offered by one of the aircraft interior companies that is a pair of urinals in place of one lavatory. However, it does still have a door and a sink.