> you aren't moderating a small community, you are moderating the whole world Sure, but you are still moderating for a small community. One person's spam is an

> you aren't moderating a small community, you are moderating the whole world Sure, but you are still moderating for a small community. One person's spam is another's ham, so it's much more difficult for Gmail to be as accurate as my spam filter (which only needs to learn from a couple hundred people's preferences) because it will inevitably overfit.