U can't put someone to court for something ridiculous like that. So the cops wont come.
They might just send a letter, even that chance if very low. Second, he can NOT hack a server, the only thing U can hack is the RCon/ref.
U can not access any other code, if you can hack that, then you are VERY VERY good, and they you are hacking other stuff then such stupid things.
So, if he "hacked" the server, it means he got ALL passwords of that server, given by an admin, but the guy who hacked it, changed all passwords. That's what could happen.