User and the XWiki.XWikiUsers Object

Hey there, new to all of this wiki stuff and I love this emerging technology. Well, to the point. I was experimenting around on my own site and playing around with the user objects. I do not think it is wise to allow newly registered users to edit thier objects, I registered a test user. Went to his User Page, edited the objects and removed the XWiki.XWikiUser object. To me this had an interesting effect. 1) The user only would get challenged for a e-mail address confirmation. 2) The user could not do anything (At least not that i found yet) Yipee good security 3) The user did not show up on the administrator's user list. Although the first 2 are great, #3 to me is a problem, unless there is another way of discovering this user? Well, when I added the XWikiUsers object back all of the user information was back (Though shouldn't it be purged when the class is removed?) Basically I am concerned with people creating accounts, removing this Object and not comming back to my website because they screwed up their account and I will only know if they take the time to e-mail me.