I'm ashamed that this doesn't surprise me much. This looks like a huge oversight on Facebook's part, but with the countless reports on Facebook failing with privacy here, there and everywhere, it's like I don't care anymore.
The thing that numbs me even more is that client work, no matter how good of an argument one gives, will always have some form of third-party social login because it's oh-so-important and users will _always_ use it.
The thing that numbs me even more is that client work, no matter how good of an argument one gives, will always have some form of third-party social login because it's oh-so-important and users will _always_ use it.