Maybe proactively get a list of bad domains from here http://www.malwaredomainlist.com/forums/index.php?topic=3270.0 http://www.malwaredomainlist.com/forums/ind

Maybe proactively get a list of bad domains from here http://www.malwaredomainlist.com/forums/index.php?topic=3270.0 http://www.malwaredomainlist.com/forums/index.php?topic=3270... and shadowban any IP/user that adds any of those domains to any text. For the shadowban, add a delay that increases with the number of views of the document, so that it's not immediately visible;