On a similar process I find disturbing that when a friend decides to use WhatsApp and the decide to share their contacts with (f...ing) Facebook, they give them my name, surname, phone number, and who knows what else is in that contact card.
They don't ask me, I don't approve that, but still Facebook gets my data. Same applies for Viber, Signal, etc. of course.
It doesn’t matter, you only need a small % of your contacts to leak their contacts to Facebook/WhatsApp and it’s trivial to build a graph of almost everyone you know
They don't ask me, I don't approve that, but still Facebook gets my data. Same applies for Viber, Signal, etc. of course.