The admins can only ban people from our server; even if someone ends up getting banned they are still free to play on other servers. No one is taking your money away. But I come here to post demos of suspicious people all the time; I don't want to have my favorite server overrun by hackers. Like Rem says, many of us have a stake in keeping the server hacker-free, so don't start taking stuff personally, unless you really are hacking, in which case feel free to take it personally.
