Weird. I don't know a solution.

It remains true that I refuse to use my Facebook account on the public internet. For the same reason that I don't 'friend' the whole internet. :)

Anyway, check if these accounts https://www.facebook.com/whitehat/accounts/ can log into your service. Cheers!

> Exactly. That's why we did not use Google identity service. Google accounts are disposable, while Facebook enforces one-account-per-person policy.

Facebook fails hilariously at enforcement of this.

> Google accounts are disposable, while Facebook enforces one-account-per-person policy.

Facebook might claim to, but they don't do much of a job of it.

At least you must be careful when using multiple Facebook accounts from the same computer. It might cause your main Facebook account locked, and take you a while to have Facebook unlock it for you.