i second your mini-rant.I think those signs are a weird concept in general. Are they supposed to make other drivers more cautious so as not to hurt your baby or are they just supposed to advertise that you procreated? I think drivers should probably be just as cautious regardless of the presence of babies or not. Also, babies are actually more likely to survive car accidents because they don't tense up. Just like drunk people.
Sorry for the mini-rant