It's not uncommon, at least where I drive, to see a "Baby On Board" sign stuck to a car's rear window. I've been wondering. What does this sign really mean?
I've somewhat assumed up to now that it means, "Please don't tailgate me as I have a fragile occupant in the car". In that case, the sign has no effect on my driving as I don't tend to tailgate anyone. Doesn't seem to effect anyone else's either.
Or does it mean, "Watchout for random things thrown out the windows?". Not too helpful. More likely it means, "Driver hasn't slept well and may drive erratically". However, in that case, the sign should be on the front window. It could mean, "I have a baby in the car and that's why I'm driving so friggin' slow". But in my experience, cars displaying "Baby On Board" don't drive slow. They're usually on hatchbacks with a harried mother stepping hard on the gas pedal. Maybe "Baby On Board" is just a form of proud display by new parents? Misguided but harmless I guess. It could also mean "Don't park close to me as I might bash my door into your side trying to get my baby in and out of the car". This seems to be the most useful meaning and I certainly avoid parking next to anyone with the "Baby On Board" sign.