Originally posted by lemondropNo. Read the Terms of Service (link is at bottom of page) and you will find this:
can you have more than one account
3. YOUR REGISTRATION OBLIGATIONS
In consideration of your use of the Service, you represent that you are of legal age to form a binding contract and are not a person barred from receiving services under the laws of the United States or other applicable jurisdiction. You also agree
(a) You will not create more than one account.
Management here are fairly relaxed about minor offences, but creating a second account will get both accounts banned for life as soon as it's observed or reported. The main reason it's regarded as such a serious offence is that its principal purpose is cheating other players by creating fraudulent ratings.