You really are wasting your eneergy being upset by this.
My daughter is one of the only children who uses a car seat when being collected at her school, she is 4.
Every week a local team wins some cup or other and kids are carried sitting out of the windows of the cars while the driver beebs the horn and they all wave.
All are witnessed by gardai but nothing is ever done about it.
Local school bus is 81 C belching out fumes and barely able to struggle up hills, no seat belts, they are lucky to have seats.
I am done getting upset over it, commenting on it, or even trying to get people to see the dangers.
You either see it as a hazard or you don't.
Save your energy.