Why does it need to be "enforced"
I get it.
It has to be "enforced" on the same cohort who zoom past me at traffic lights when I stop on the red, or the person who crossed a train line when the boom gates are down and the lights flashing.
Or is this the start of a Darwinian period in human history?
It needs to be enforced because this group are intent on dragging you onto the train lines with them.