13 1/2 Things I May Never Understand- Can You Help?

You may call this post a rant and I suppose in some ways it is.  But what I really want are your opinions.  Each of us is entitled to our own views and these are some things that I need you to help me to understand.   I will do a follow-up post of your responses.

As we get older, we are supposed to get wiser.  However,I don't get it -- unless you can enlighten me.

1)  Stickers on cars that read "Precious Cargo On Board." In other words, if you were considering slamming into the back of my car STOP RIGHT THERE.  There is a baby on board and you could hurt him.  With all the weirdos in the world, why would I want to advertise that I have a baby in the car?