I am with frontlefthamster and fear his post was misread.
I don't think it takes much brains to work out the premise of the post wasn't to disrepute the integrity of somebody accidentally filling up with the wrong fuel, whether it be car, aeroplane, submarine, etc, because yes, everybody makes mistakes.
However the reference to being unfit to hold a pilot's licence most certainly is applicable should somebody then make the decision to fly an aeroplane which they know has been filled with the wrong motion lotion.
But of course, we don't know that, do we.
