Jorge,
That "should" never happen in reality,but occasionally it does.Only my last flight I had to move an elderly Indian lady from the seat opposite me,who amusingly had hung her walking stick on the door handle,to another seat.There is no problem with her sitting there during the flight,but certainly not for T/Off and landing.The Check-in staff should never seat anyone who is not "able bodied"amongst other restrictions, at those seats.
Happens RARELY.
Ratsarrse,
I'm going to assume you were either "rattarsed" or tongue in cheek when you posted,'cos none of your points are worth reply,either constructive or otherwise.Frankly,and I speak as a smoker,if you cannot get through a few hours without a ciggie,then you are a pitiful human being.
Ppruners,keep the "constructive" comments coming.....some of us are listening!!