While perfection is an admirable goal in any endeavor, especially taking care of a child, humans being humans, perfection is simply not possible.
How many times did your young children get themselves into some type of trouble, minor or serious, because you turned your head away for a split second?
The sign is put up as a "heads up" to an out of the ordinary situation. Nothing has ever gone wrong until now but, someday, it may. What is wrong with a parent giving a "heads up" in order to take every possible precaution for the safety of his child?
Because it comes out of someone else’s pocket.
As the Godmother of an Autistic child, I can tell you that no sign will take the place of an adult’s eyes. To ask the community to pay for it, puts the responsibility elsewhere as well. I may be slammed for saying this, but I have seen many a parent of a child with special needs that have a HUGE entitlement attitude. They should always get some special treatment because of that child. Not all, Lord knows but some.
Did the parent pay for the sign?
Poly, the picture of that child reminds me of what I used to do. Banana, spaghetti, and even Vaseline would go in my hair.