From a town I lived in for a few years comes a tale of startling stupidity that beggars the imagination - a 'responsible' adult allowing a young child to lie on the platform of the railway and dangle his head over the track, and then told somebody who wanted to do something about it they were being a 'do-gooder'. Considering 1000 ton freight trains go through the station at a fair-old lick, what, pray tell, could possibly go wrong?!
https://www.bbc.co.uk/news/uk-england-wiltshire-44916009
According to calculatorsoup that freight train at 80kph would have a kinetic energy of 246,914,000 joules (i.e. a lot). I suggest that might make a bit of a mess, all things considered...