Forum:Can we prevent unregistered users from editing?

Is there any way to ban users who haven't actually registered/logged in from editing? Because I'm @#$%ing tired of Wiki vandals. (Plus I hate it when I make an edit to a page and realize I wasn't logged in when I made it. >_>)--Ryusui (talk • contribs) 21:27, February 10, 2012 (UTC)