ElTerprise: Yes. It's not really logical.. but afaik Steam sells the censored European PEGI version and not the American one of Airborne. But W3D and RTCW are also technically not strictly region locked. It's possible to install and play them and i think it might be even possible to redeem keys of them in Germany....the whole situation is a mes...
I'm not sure about the reasons of region locking because both Dead Rising 2 +3 (and Sleeping Dogs Definitive Edition) are also region locked probably because of high violence....
Well would you consider both Indiana Jones and Inglorious Basterds or something like Iron Sky educational?
But it's true. I remember that from Inglorious Basterds where the Posters had to be edited...
Region locking on Steam has many stages. You can prevent a storepage from appearing to a certain region, or you can prevent activation to a certain region, or you can even hide games from a library when on a certain region. Needless to say, it can be highly infuriating.
As for the movies, I suppose I could say "educational", as Inglourious Basterds was the example that I had in mind.