I would have said something to the mother doing this. It is absolutely disgusting in a restaurant, wine bar, where ever in public. Did this place not have a loo? I have changed many a nappy in the smallest, dirtiest loos, without baby facilities, on the window sill, on my lap, on a filthy wet floor (on my coat) at Heathrow, on the pushchair fully reclined, in some scariest of places in China, but NEVER in public to some poor unsuspecting stranger. ICK!