The point I was making is that the person(s) doing this (usually school age children) run the risk of being hit by a train if they are not apprehended.
I don't see anything unimportant about preventing a possible fatality.
I'd like to see the evidence for the amount of fatalities caused by children putting coins on the line. I'd also like to see the evidence of children then going on to putting larger items on the line later on in life, as someone on this topic has also mentioned.