It's interesting how society characterizes its younger members as "forward thinking", liberal, embracing diversity, etc. While it is sometimes the case, more often, it is the experience and intermittent tragedies experienced with age that brings tolerance. When it comes to a simple thing like dining out, I notice it. We only eat at casual (and loud) restaurants, e.g. Columbus Fish Market.
Several years ago, we went to Haiku (a big risk) at about 5:30 pm (pretty darn early for dinner, certainly before the cool hipsters eat) with another couple. Our kids at the time were about 2 years old and, surprisingly, well-behaved that night. Every group of young people entering the restaurant would be met by the host. The host would show them to a table near us. Then, one in the party would whisper secretly to the host. I suspect they expressed their desire to sit as far from us as possible, since they would usually sit down as far from us as the room would allow. Maybe I'm just paranoid.
We do everything to prevent a bad experience for diners near us and sometimes have to leave if the kid gets too loud. I think we're considerate.
Another time on a flight, an older gentleman reclined his seat such that his head was inches from Frankie. It happened to be the only flight ever she was loud. He slept through it. When the flight was over, I apologized to him. He just shrugged it off and smiled.
Tantrums are frequently observed in Target when a flustered Mom is trying to pay for goods and maintain order among several little ones. Parents look on with empathy. Many just roll their eyes. While at OSU's athletic center, Frankie had a tantrum in the middle of one of the aerobic machine areas. I just stood over her waiting for it to end casually watching the videos while a horrified, busily-cycling crowd looked at me with disapproval. I think they just turned up their Ipods.
Society is a collection of age, culture, gender and ethnicity. The least tolerant, most likely to look upon difference with disdain are often the youngest and most self-absorbed.