Seems like K2/G1 are stepping up and taking action. They're finding all the people using proxy and banning them. I was randomly dc'd and got the "Server under maintenance" message. My account is gone and from what I can tell a few people I know are banned as well. If you try to log the website, it will say your user name and password combination does not exist so they really just don't care what you have to say.
Just take this as a warning. Yes, most of you aren't sharing and this is a great big "haha, I don't share I hate you cause you share" for you but I'm just letting people know you most likely will be banned.
I'm not sure as to how long the bans are, I'm guessing permanent.. I'll go read the TOS real quick and edit this in a bit.
EDIT: Don't use shared IP's, find a static IP proxy.