it would be cool if posts could be geo-tagged

i see a lot of news about australian politics, news of seattle, darmstadt, brazil, ... all places where i don't live, where the posts aren't relevant to me. it would be cool to be able to tag posts/communities with a geographical location so i can easily filter which posts are / aren't probably relevant to me. in one setting in my profile, instead of having to block each community individually (there's hundreds of them at this point)