How come some parents are brain Dead?

Last night was the worst. We went into out local Outback Steakhouse, which was pretty busy. After a 20 minute wait we were escorted to a row of tables along a wall. The back seat was one big bench that ran the whole length of the wall and had chairs on the other side. There was this big family at the table next to us with a small infant in a carseat on the bench seat very close to our table. It was late and there was no other tables so we just kept our fingers crossed and sat down. Baby was very cute, and very quiet about 12 inches from my husband on the bench seat. Well halfway thru the salad baby messes diaper. I mean really messes diaper!! You know, that awful gag me stench. Well after about 5 minutes hubby politely comments to father that someone needs a clean diaper. Father smirks ha-ha and continues to eat. I finally had to go get the manager to ask them to change the baby. Babies father was quite peeved at having his meal interupted. Our appetites were gone and before being served main course got up to leave. Manager was quite gracious..comped the drinks and salads and gave us a discount coupon for next time. But our meal and our night out was ruined. We grabbed McDonalds on the way home.