[onlinejk]

To clarify, am I right to interpret this:

* "I could assign phone number as primary login"

... as equal to this:

* Change old login value ([e-mail]) to new login value (3035551212)

?

If so, personally I wouldn't like that most of my usernames were going to be same. I realize different usernames is security through obscurity at best, but that is my initial reaction.

[anonHash]

I agree.

If username is public, then it is not secure by obscurity. Email addresses for email account are public. So by changing login from email address to phone number we enhance security.

At the same time, we change it to a unique username instead of phone number we also enhance security.