Heck the first truck I ever had, had the GAS TANK IN THE CAB, behind the seat,,, why worry about a little glass in your hair! ROTFLMAO!!!!!!
I understand your concern,,, however we can't go through life worrying about every little "WHAT IF",, ya know? Life would be very very stressful if that was the case.
If you have the money, replace it, if you are that worried about, make everyone in the back wear bicycle helmets, as mentioned above!
