User blog comment:Tesarasleader/Idea/@comment-433902-20100420170018

Well, there's nothing I can do to disable editing for unregistered visitors, but the Wikia staff can, I think. However, the unregistered editors do a lot of work, and the few vandals can easily be blocked.

Concerning the dupe account thing: Having two accounts isn't forbidden, unless you vandalize with one of them of vote with both accounts, or misuse it in way other way. But the ability to create a second account is important when someone needs a bot account, me, for example.

And if we suspect that someone is abusing dupe accounts, there is the "CheckUser" ability, which lets the user check the IPs of accounts. This ability can only be used by Wikia Staff, VSTF and Check Users.