I work for London Underground, so I have seen my share of nastiness and stupidness. Kids are the worst culprit for stupidness. I have seen so many kids run in front of a train playing chicken and be less than inches from death. Never seen a suicide, but having seen a person under a train it is not a nice thing to have to deal with, certainly not something I want to see again in a hurry.
As previously said, the train operating company will normally provide counselling etc, London Underground being very good at this, but that doesn't always solve problems.
These people really don't realise what kind of mental anguish it puts on the drivers of the trains. I have known some really nice guys have to quit thier jobs becuase they panic whenever they go near a train. Its very sad.