Precisely what this guy said. BLC's anti-cheat is only active on servers that have purchased their anti-cheat (BAC). BLC = BadLionClient. BAC = BadlionAntiCheat. BAC is something that servers have to pay for, and so not many servers actually use it or support it.If you log onto a BAC protected server, you'll be insta-banned. Otherwise, you can cheat as long as you want without the client itself banning you.