I'm also concerned about what measures are in place to prevent the problems we see with Reddit:   What stops moderators from becoming powerusers when they suddenly find themselves moderating communities with thousands, tens of thousands, and eventually hundreds of thousands of users? As you can see on /r/undelete, Reddit is rife with political deletions and censorship   How can you prevent fringe interest groups becoming so powerful that they start to threaten the public image of the business, causing the business owners to clamp down on freedom of expression?   What can you do when an eternal September hits and the average intelligence, age, and etiquette of the userbase gets dragged down?