I don't know about the other servers but in Odin we've encountered this issue with multiboxing and RMT bots filling the newcomer section of our Novice Network.
Not only that but they are also taking space in the player capasity of the server.

Our only solution so far has been clearing the channel by kicking out the potential bot candidates. But as it turns out the kicked newcomers will automatically come back in 30 minutes.

I just wonder if there's a solution to actually stop this loop from going on.