I don't mind if the couple next to me is tense or the kids are whiny. I'd even be happy to hear an honest argument, evidence of thinking. I'd like to know these teeth-perfect families don't just buy each other stuff but just occasionally can talk to one another.
I haven't always hated McDonald's. When my kids were little and I lived in the U.S., they were as susceptible as anyone to Happy Meals and tatty toys that subsequently littered our sitting room.