Its certainly more traceable from the perspective of metadata aggregation. If you were looking at the users from multiple sites, you could easily consider "*@bu

Its certainly more traceable from the perspective of metadata aggregation. If you were looking at the users from multiple sites, you could easily consider "*@bumblebutt.example" to be one person thus linking all accounts together. The benefit of a public site is that you can't use the hostname as an identifer for a single person.