Does not contain any useful information other than "Hi, I'm JohnDoe."
Such a page should not automatically be deleted. The page may be a candidate for deletion. Upon discovery, add an AreYouThere tag to it to alert the 'owner' and to put it on the ToDo list for the next WikiSpringCleaning.
A home page that says no more than "gee this really works" isn't really a home page and is a candidate for deletion. However, if there is even just enough information to consider saving it here then I would suggest leaving the page in place. -- WardCunningham on DeleteAbandonedHomePages
If a page has contact information or a link to a homepage, it's probably best to leave the page, or at least attempt to make contact and giving a fairly long timespan in which to respond.