People just don't understand how fast trains are going and how little notice they will have if a train comes. It is worse with electric powered trains, but even with diesel prime movers the sound may simply not be there, but people might assume it is. Kids I can understand, as kids we occasionally put pennies on the tracks of what is now NJ transit, then DLW/Conrail, we didn't dawdle and on that stretch you could see the train a long way out, but even so (it is why the project safety programs are so important, kids need to know).
Just as an fyi (not that it is relevant to this situation), Mennonites and Amish are not the same people, though they are related historically and do share some similar beliefs. The Mennonites and the Amish have one thing in common, they don't have one unified belief system, The Amish tend to stay to the older ways, but not all do, and Mennonites range from being pretty old school with dress, modern conveniences, etc, others live more in the 'modern world'.