No, no, doesn't anyone understand? The "Baby on Board" signs serve a useful warning to drivers in the vicinity of any car sporting such a sign.
Steer clear. That car is being driven by someone who is probably distracted by a screaming baby, or talked at by any number of demanding children, all demanding something different at the same time: windows open, windows closed, I forgot my lunch, homework, musical instrument at home, school, friends.
When I see a "Baby on Board" sign dangling in a rear window, I give that car a wide berth and watch out--for my own life as well as theirs.
(Mother of Three)