Hackers. We all know them. Some hack to help you build your server. Then again most hack to destroy. I also am including griefers in this article because some of them hack too. Now I know some may argue that hacking helps, example, cops hack into creepy stalker people computers to catch them. Nevertheless it is annoying, dumb and ruins the fun of playing an online game. Prime example of this is Call of Duty: World at War. Look at it. It's a Hackers Paradise. Griefers are fairly annoying. However spleefing games are fun so I guess that's another form of griefing. All-in-All, hackers & griefers are even more annoying than spammer.