The sign "children in the car" was invented in the wretched West. It is needed in case of a car accident to give a signal that there is a person in the car who can not help himself, pull himself off and get out even if alive - and more likely to have suffered in an accident than an adult (that is, doctors are absolutely needed, even if the driver got off with a bleeding). Children, unlike adults, are not always visible through the glass, and their bones are more fragile.
In addition, rescuers, seeing the sign on the glass, but not finding the child, understand that he could have flown out of the car and need to look for him.

But in our country, where no one wants to help anyone and even considers it a personal insult, if they ask for help, where healthy men hang a sign of disability for the sake of benefits, where it is inappropriate to insult and humiliate children in the name of politics - in our country this sign is depreciated and no one needs a naphyg.