"...do what you can to mitigate the risk of an incident, talk to your doctor. This may include wearing Depends or other garments to mitigate soiling your clothes..."
Just how does that humanity work? It is against the FAA regulations to be out of your seat during taxing. The airline can incur heavy penalties for not enforcing that rule. Will the FAA give the airline a humanity waiver? Who decides if its time for humanity? The passenger or does the FA judge it based on say a distressed appearance? So any one who says I gotta take a leek gets to get up and go during taxing? Or does the plane go park and then let the passenger go?