I have zero problems with this type of citation. From the description, it sounds like there’s a safety issue with some road markings that needs to be fixed and everyone who is not endangering young pedestrians would be happy.
My only problems are that it tickets the owner instead the driver, and the fine not appropriate. Instead of just a fine, they should probably make the violator (at least repeat violators) pass a subset of the driving test pertaining to laws on school busses (or drivers Ed, etc)
I think Sweden issues fines as a percentage of your income.
The other part is that punishment is only half the picture. Many of these infractions are likely based on ignorance, which could be addressed with education (the driving test in the US is a joke).