[nroets]

Facebook used to have a feature that allowed users to find a profile if they have a phone number. I found it useful when I received a text from an unknown number. Especially to protect myself from being catfished.

If I understand correctly, someone collected all the queries and all the results and made a phonebook.

I think Facebook cares, but at the same time they always benefited from these measures where they let their users see as much as possible.