When I was in graduate school the same thing happened at one of the school cafeterias. I complained to the management there (a student) and was told she was a faculty wife and they couldn't do anything about it. Some people not only have no class, they actually register as negative on that scale
I worked in retail and it was stunning to see mothers change kids diapers ‘on the floor’ of the store....I had no problem telling them there is a dressing room and bathrooms available for that...