Blogging Roller

Two Wiki spammers have been trying for over a week to sneak links into the Roller Wiki. I subscribe to the Wiki's Recent Changes newsfeed, so I am able to catch them everytime, but I am getting a little tired of doing this. One Wiki spammer has the IP address 222.64.23.78 and is advertising the site http://www.newline.sh.cn. The other Wiki spammer has the IP address 61.149.181.4 and is advertising http://www.99986.com. I would hate to have to set usernames and passwords for the Wiki again, but these dirtbags may force me to do it.