Well, go ahead. Make a mod.
It it imossible that Bethesda could hear you, however, there is no evidence that a single person's idea has affected a video game's design and outcome.
Plus, copying the idea from a movie is not a great idea for a mass-market video game.
I myself am making a mod into my other favourite game, based on ideas I got from watching several Sci-fi movies, so if you know anything about coding, or if the Fallout 2 Editor allows, you can try making a mod based on your ideas. It might need cracking the .exe, and if it does it's illegal to publish the mod.