I recently was informed by two separate couple friends of ours that their weddings would be child free. They didn't want me (or our son, who they adore) to feel bad. My response was, "okay, we weren't planning on bringing him anyway".
I can completely understand our friends who do not want to have children; some of them honestly shouldn't. I do not understand the people who treat those who have children (and those children) as if they have caught some sort of infectious disease.