I don't think you were out of line at all. But, pretty much anything you say in public is going to mortify your daughter. That's just a right of passage. How old is she, anyway? I'm almost 29 and I always say something about poor customer service. I try really hard not to let sarcasm take over my tone. I ALWAYS point out bad service, though. Even if it's in a joking way...I've been in a situation like that, and, the girl didn't acknowledge me at all. I just laughed and said "A hello would be nice." She laughed and admitted she had lots of crap on her mind, that she was sorry... I try really hard not to be ugly, but, sometimes even that happens. Good customer service is so rare. It's sad.