There is a knee jerk reaction to pass stupid laws, often with the caveat "It's worth it if it saves even 1 life!" Here is the latest.
There is a law in New York that bus drivers have to check the bus for sleeping children.
First, you shouldn't need a law for this.
Second, it doesn't work if they just hang the sign in the back. This came to Ed's notice as he watched buses on the road to school - with kids in them, and the sign already hung all over.