I was just reading about some restaurants that have child-free policies. I understand getting irritated if a child is misbehaving and the parents are doing nothing to redirect or discipline them, but banning all children under 6? My siblings, cousins and I grew up going to nice restaurants and a country club with my grandparents. I knew that when we were there, we were expected to be quiet and not run around and to use good manners. I know I was able to do that before the age of 6. Sure, sometimes there were incidents, like when one of my cousins set a straw (I think) on fire with the candle, but we were in a private room that time, so we weren't disturbing anyone.
I have similar high expectations of my children when we're out. I don't expect them to be perfect, but I do expect that they'll be quiet and not run about. When we went to London last year, my parents took Kieran out to eat without me, and they raved about how well he did.
I think it comes down to being considerate. I try to make sure that my children and I are considerate of those around us, and so I teach my children what is appropriate at restaurants or cinemas or wherever else we are. I do think others also need to be understanding of the fact that sometimes a child might be a little noisy, but that doesn't mean the parents are ignoring the child. Really, I think it's sad if we don't see and hear children, for how will our society continue without children?