Ah, I see. Like most sites I figured that making alt accounts was prohibited, but a quick look at the rules for this site says it is okay:
You are not allowed to register accounts to create an illusion of more than one person.
Also known as "sock puppetry", you may not use another account to vote on a poll or back up an argument, mislead other members, or evade a ban. Evasion of a ban, in particular may, depending on the offences a member commits, result in punishments such as the ban time being doubled and/or the timer reset. This does not prohibit having multiple accounts (for yourself or individuals in your family) in general. We will ban all accounts used for ban evasion without question