I've had the pleasure of sitting next to a morbidly obese grandmother traveling with her 18 mo. old grandson, who she intended to hold in her LAP for the flight! SHE HAD NO LAP!
He climbed up onto MY lap. I don't care for kids, but I wasn't going to be a B, and it was a relatively short flight from Miami to Atlanta. IMMEDIATELY after takeoff, he pooped his pants, so I had the pleasure of smelling THAT all the way to Atlanta as he wiggled around and made it into a pancake. Keep in mind, this kid and his grandmother were total STRANGERS to me and my hubby and I were on our way back from our HONEYMOON.
Ewwwww, apparently grannie had not brought along a diaper change.