This is an "anonymous" account someone has registered with the BugMeNot service. Whether this is actually worthwhile is dubious - people not logged in can still edit, and registering a username takes about 5 seconds...
Yes, the original SirAglet has bothed missed the point of Wikipedia and BugMeNot, well done. The purpose of BugMeNot is to hold registration info for sites that discourage freedom of information. Wikipedia is the very opposite of these sites and is the heart of freedom of information on the web.
... some clever comment about Microsoft and open-source or something...