Many years ago a quote attributed to Samuel Taylor Coleridge became one of my very favorites: "Every reform, no matter how necessary, will, by weak minds, be carried to an excess which will itself need reforming." Perhaps that's at work here, although it does seem that the particular Metrolink line in question could use some kind of safety upgrading. But that's a thought based only on media coverage I've been reading from a great distance, and that's a risky thing!