Just gonna point out.
Reinforced windows.
I also remember reading somewhere (and I have just spent the last 10 minutes trying to find it again. but I am refering to years back) something about Secret Service having a low velocity (I think) firearm or cartridge, that was design so that it can still cause damage to a person, but wouldn't damage an aircraft skin/windows. I am aware that with aircraft you still have an atmosphere, but thats not really my point.
Eitherway, I can actually see the points presented either side, both lore wise and just Mechanic/OOC wise.
But to be honest with you, 400 years in the future, the walls and reinforced windows are gonna be far stronger than they are today.
*shrugs* I dunno.