I got on and blatantly saw him advertising " Join Biomecraft!". I then told him to stop advertising, on which he snuck his server IP onto a sign( still on his lot, btw.) I've heard reports this is the second time he's advertised the ip directly, and that this isn't just a test server. He also has 3 days played time, so i'm sure he knows not to advertise. I've only banned him for 1440 minutes, though.
