Yes, the hammers are a European thing. They would probably be near worthless against a window that meets the FRA requirements for passenger car windows. Somehow they have never seemed to have heard of the American system. I can not imagine why anyone would deliberately add broken glass to an alread messy situation. There is a certain level of quite literally "bulletproof" in the FRA spec.
Yes , those Europeans know nothing about railways and safety systems do they? Building the cars so heavy they can hardly move but doing next to nothing about stopping head on collisions with freight trains or thousands of grade crossing collisions a year is really the way forward. Possibly.
Huh? I though we were talking about windows. I was, anyway. I remain mysitifed by the continuation of the emphasis on breaking the glass when a method of escaped through a window that does not result in broken glass is well proven.
But: since you mentioned it:
Crashworthiness of the overall vehicle is a whole other subject, and the various considerations not near as simple as you seem to think. We cannot wave a magic wand and suddenly eliminate road crossings and freight trains. To fail to design and build vehicles to fit the reality of the situation would be malfeasance of the worst kind. Don't you think "cars so heavy they can hardly move" is somewhat overstating the situation? The converse would be to be concerned about "cars constructed so flimisly that they come apart upon impact" - like several did at Eschede.
Newsflash: Twice as strong does not mean twice as heavy. Smart design can do a lot to increase strength without a large weight increase.