Vault-Tec Industries has a real world counterpart

If i take the paranoia out of the equation, this seems a more practical and fun idea. You could always bury it better/deeper and add thick concrete walls and a retinal-scanner for the round wheel shaped door access point.

Come to think of it, in the Fallout 3 universe they probably would. Bethesda must have overlooked it.

Then I am canceling my subscription. They have a job and I expect them to do it.