The site: http://www.vesa.org.uk/moodle/
The Porn: user 764
The site: http://www.essexacl.ac.uk/moodle/
The Porn: user 6039
The site: http://vle.nfgs.essex.sch.uk/
The Porn: user 182
The site: http://didawson.co.uk/moodle/
The Porn: user 597
The site: http://hope-foundation.co.uk/
The Porn:user 1342
The site: http://fie.org.uk/Moodle/
The Porn: user 625
Found these in about 5 minutes of searching among thousands of others just in the UK.
It's worth noting that Moodle is the ONLY lms with this problem...Blackboard, SAKAI, ATutor...none of the others have this problem.
(Edited by Martin Dougiamas to remove direct porn links - original submission Friday, 4 September 2009, 09:06 AM)