Baby on board

There are certain things in life that are incongruous with everyday logic. For example:

1. Why is there only one Monopolies & Mergers commision?
2. If animals weren’t meant to be eaten, why are they made of meat?
3. Why can you leave a cow in the rain and it’s fine, but your suede jacket will get ruined?

There is one further thing I’d like to add to this list: why do people buy those “Baby on Board” signs and hang them in their vehicle back windows? Is it an attempt to make me read that and think “oooh, I’d best not drive into that car for fear of hurting a small child… but that one over there hasn’t got a sticker so I’m going to ram it.”