This is either a feature request or a request for discussing solutions to the issue of known comment spammers against XWiki installs. There's known spammers like davycrokkett@hotmail.com (see http://www.nielsmayer.com/bin/view/XWiki/DavyCrokkett ) which have to be managed and curtailed for any XWiki install enabling comments. During registration, it would it be nice to check sites like http://www.stopforumspam.com/ and prevent registration emails from going out to known comment spammers. For example, the aforementioned spammer is listed at http://www.stopforumspam.com/ipcheck/111.243.227.227 suggesting Current country of origin: Taiwan, Province of China Date IP Address Username Email 1-Jul-11 07:31 111.243.227.227 coseteene davycrokkett@hotmail.com 30-Jun-11 18:29 111.243.227.227 Assusypesound davycrokkett@hotmail.com 30-Jun-11 13:43 111.243.227.227 Impuppota davycrokkett@hotmail.com 30-Jun-11 11:22 111.243.227.227 Biordaccoma davycrokkett@hotmail.com 30-Jun-11 07:01 111.243.227.227 rooviskitte davycrokkett@hotmail.com 29-Jun-11 23:59 109.230.222.175 Beethyemegree davycrokkett@hotmail.com 29-Jun-11 22:49 111.243.227.227 Kneefshes davycrokkett@hotmail.com 29-Jun-11 13:59 111.243.227.227 seltencarne davycrokkett@hotmail.com 29-Jun-11 13:31 111.243.227.227 inigneedync davycrokkett@hotmail.com 29-Jun-11 11:50 174.142.132.203 Beethyemegree davycrokkett@hotmail.com 29-Jun-11 11:50 174.142.132.203 phorilmiplism davycrokkett@hotmail.com 29-Jun-11 07:53 111.243.227.227 Agergeevame davycrokkett@hotmail.com 29-Jun-11 05:56 111.243.227.227 Atomnegmess davycrokkett@hotmail.com 29-Jun-11 05:50 111.243.227.227 Impuppota davycrokkett@hotmail.com It would also be interesting for such flagged users to return a list of associated IP's (such as above) which could be blacklisted as well. I guess the correct solution would be to use http://extensions.xwiki.org/xwiki/bin/view/Extension/Social+Login but then the spammers would just end up getting twitter, facebook or foursquare logins and use those instead of hotmail accounts. -- Niels http://www.nielsmayer.com