Nonchalantly telling your child it's ok when they knock a few glass jars of olives onto the floor (where they shattered and spread glassy olives throughout aisle 9) isn't horrible really, but adding, "there are people here who'll clean that up" earns you scorn points!
And I thought I would wear out my scorn gland when you then proceeded to pick up a bottle of bacon bits, open it and stuff your festering gob. Yes, you actually poured bacon bits into your mouth. Well, most of them I imagine landed in your mouth. I know that a lot of them also were added to the glassy olive slurry on the floor.
I know it's not good to judge by appearances, but you seemed like a well-to-do lady, and your children looked healthy and nicely dressed. Maybe it was a bad day. I don' have kids, so I can't know the mental strain that it puts you under.
No, that's not an excuse.