Reddit is a private venture and a business, although a badly managed one. If permitted to by the architecture of the site/service, any insider with access will abuse his/her powers in some way. Of course, since it is a private venture, it is not abuse at all but the betrayal of the unwritten assumption that powers won't be used in a way not favourable to the members and their perceived freedom of speech (which no one except the owner has on private property). If they decide the letter "e" is banned, then you better start writing all your posts without "e". The concept of censorship on private property online is something that is a misconception: you are only free of it on your own property and must continuously protect that property and ability. The only responsibility anyone in Reddit has is to the funders/sponsors/investors.