I posted this in the other thread over a week ago, thanks tips. This is only how they ban you the first time, the second time it's a hardware ban.I've been banned a couple times. It won't let you sign up again from the computer you were banned from but you can sign up easily somewhere else and play again on same computer.
Oh and actually you can sign up from the same computer, I was using Firefox and I tried IE instead and it let me. So they must just put some kind of cookie on your computer.