The entire idea of a community is for it to be an owned place where there is moderation. Hive itself is totally decentralized you can post whatever you want on your own blog. A community is is thematic usually in nature but is a separate layer on top of the blockchain using a software called hivemind... that software allows for moderation. And communities are not censor-less locations no one ever has claimed that , they were in fact built on the idea of allowing people to create a moderated thematic location... otherwise use topic-tags if you don't need moderation.