Reddit treats subredditd as the property of the person who created it; the head mod and mods are given control over the content on their sub. While I don't like the fact that politics is biased, manipulative, and openly dishonest, I don't think it is violating any rules. With that said, I see absolutely no reason why politics should be a default sub. Given the extensive history of censorship and brigading and some legitimate evidence that the sub moderation was sold to a Democratic PAC, it should not be a default suv