In a few cases I generate nicks or totally random user names but only if the other users of the service see my nick/username. In those services and in all the

In a few cases I generate nicks or totally random user names but only if the other users of the service see my nick/username. In those services and in all the other ones I still have to give them my email to confirm the accounts and actions like replacing that email with a new one. Or login with OAuth, if one does that sort of things, which is back to giving our email to somebody else. Without the original email we are toast anyway.