Forum:Spammer problem

I am having problems with Spammers on the Nitrome Wiki. They aren't spamming links, but twice every hour they are leaving spam-like content on pages. They leave content like "Keep making these articles", "I'm impressed! You've managed the almost ipomssible.", stuff like that, always making a mistake with one word. Another problem is that they only use one IP address once, no use blocking them. This has gone on for three days (since Monday August 28th 2011), and its obvious there spam bots. I disabled Comments, but then they start either blanking pages or removing certain sections of pages and replacing them with there message. No one can stay on a wiki 24/7, so I wondered if there was a way to lock down the entire wiki to prevent editing for users & anonymous users, or even better, prevent anonymous users from editing, or if there is another way to prevent Anonymous Users from editing. -- 17:14, August 31, 2011 (UTC)