[oniTony]

Why not use actual Test Users for development? https://developers.facebook.com/docs/apps/test-users

[jleehey]

I believe you're required to have a real, verified account in order to create and modify test users, and I think there are certain features that are blocked for test users.

[nathancahill]

More generally, to access and edit app settings.

[hoorayimhelping]

I think what GP is saying is that you need a Facebook account to get a developer account, so they create fake identities to attach to developer accounts.