Don't forget that Volition put in things like Boba Fett's outfit and Doc's helmet from Back to the Future.
I'm talking more like a direct rip from another game, not just a new item that pays homage to another. Example being, people have ripped stuff directly from the Witcher 2 to put into Skyrim, and as far as I know CDPR is okay as long as there no charging for it.
However on a lot of russian sites you get rips from games (PC and console alike) for Fallout 3/NV, games not limited to and including Resident Evil 4, 5, and 6, Call of Duty, Battlefield games of all varieites, Star Wars games, etc, that are usually very frowned upon by the mainsteam Bethesda modding community because of obvious copyright infringement. And the publishers of those particular games wouldn't want their content ripped for any game's mods I don't think, not just Bethesda's games.
I just wanted to get an idea of an official stance of ripped content, both from you IdolNinja and your modding community, and Volition as well. But as far as what I'm hearing I guess it'll be okay for earlier SR game content to be ported in later SR games, which is definitely a good thing to see.