Adam! Its ralphmakesmovies from the minecraft server! You need to turn the server from online-mode-false to online-mode-true. With online mode off people can change their offline game names to whatever they want using a special griefing client. They can change their name into yours and hack your account. They can use their op powers to give them creative, ban people, kick people and use commands you dont want griefers to use. Plus they will have X-ray, nuker and fastbreak. You cant stop them. The only way to prevent the hacking of accounts is to change the online mode to true and if possible set up a whitelist. You have to do it quick because people are going to fiqure this out, and they are going to grief hard. Please do it. Im only trying to help.