A very interesting post on people (especially academics) with and without children at Bitch Ph.D.: Professor Mama. (Link via Majikthise, who has a good comment on it.)
One of several good lines: "We all, every last one of us, with and without kids, need to resist the idea that the other person's 'choice' is somehow unfair to us."
On the grocery store thing, I've never been bothered by people with kids, even screaming ones. (I was a pest in stores when I was a kid myself.) I am, however, often bothered by people with shopping carts, who sometimes need to have a bit of courtesy knocked into them.
