Fuck, I need to get me one of these.
So, what you're saying is: "Exercise caution when driving around me because I've an infant in the vehicle"
but here's what I hear: "My kid's life is way more important than all you other fuckers. Also, I've an excuse to drive like an asshole with this posted in my rear view window. I also expect to have right-of-way, always. I don't fucking care if you were there while I was 1/4 mi. down the road. In addition, I can wail on my horn and blame all other drivers for my faulty driving skills"
But, for serious, it disgusts me that this sign makes any difference. Shouldn't we all be careful when we're on the road at-all-times? Isn't every human life supposed to be considered equal; just as sacred? What the fuck makes your baby more important than the 14 year old boy in the next car, or the 90 year old 2 cars up? Can I post a sign saying "Elderly on board!"? It's like we're vindicating our bad driving habits via being good drivers around babies when frankly, I don't give a shit.
There should always be caution.