Weird email for some users

I too am getting this exact email, for a lot of users.
[email protected]

Does this mean that they don’t have an email associated with their facebook account? Or is it that they have set a privacy setting?
Or is it a fake facebook account?

If anyone can help out, it would be greatly appreciated!

Just got the same thing, but for Twitter instead of FB… There is a note about requiring profile completion in the bouncer settings tab, which I had done, but had failed to require email address. Just thinking out loud, but by any chance do you have the profile completion activated without requiring the email field?