Black people aren't children.
Both concepts (white only and childfree) are the same (Exclusion of the others), and come from the same place (My right to have what I want is more important than everybody else's)
Same as it was considered bad taste to have blacks lingering around, now it is bad taste to have children running around.
It's also funny that you are OK with "it is bad taste to have dogs running around", almost like it's your preference..