Where in the lexicon of the web does it say that an account name (reflected in a URL) represents the subject of the site, let alone the exclusive subject of the site?
As I mentioned previously, I have three trees/GEDCOMS on WorldConnect. Their respective Tree IDs do not represent their respective content, anymore than my generic Freepages User ID represents the contents of the several sites I maintain there.
A web address (URL) is no different than the street address of your residence or business. It says absolutely nothing about you, or the services/information you supply.