I understand completely, But as a integrator that working on projects i can tell you that most of the time the customer is not at home or want us to give him a finished product loaded on his tablet, if you don't want to use his email address you have to create a new one for registration
So for now i think that i will open a Gmail account for each project,
Because the clients are not always in the house and they cant give us there Email passwords.
we should think of a better solution ...
Customer support service by UserEcho