Well, that's something new. Can you show us the specific part of terms of service that disallows owning multiple accounts on the same server? I know it says: "We can do whatever we want, change rules whenever we want and you have to obey!", but in the current rules section there're not a word about owning multiple accounts.
So, what i'm trying to ask. Is the official position - "we gonna start banning people just for having multiple accounts on 1 server" or is it - "we want to leave this loophole in case we'll want to ban someone and we won't have any good reason"?

P.S. Sorry for my english.

It's not anywhere in the rules, but it's technically against the rules. Got it. :P