Unfortunately with the credit crunch and unemployment ruining lives and the pressure of christmas as well at the moment this sort of thing is going to become more common.
Railways are always going to take the brunt of it because a speeding train is an instant killer and the person driven to the edge won't be thinking about the disruption,the mess and those who have to deal with the aftermath.
It is totally impossible to prevent suicides on the railway if a dozen people are on a platform how would you know if someone is about to jump i feel sorry for all involved including the victim.