I wasn't advocating biking on the sidewalk. I meant a stroller. *In any case*, I admit I don't know much about this, since I don't have kids, and don't want any (no human ones, that is). But I know I cringe every time I see a little kid behind an adult on a bike in heavy traffic. Maybe it just looks dangerous (to me).
I'm definitely no fan of building bigger and bigger cars to soothe the souls of soccer moms determined to protect their families. But perhaps I have the same feelings as them
