Comment by al_borland

> it is difficult to prevent others to intentionally or unintentionally provide data to surveillance companies

One that bothers me a lot are all the apps that want people to share your contacts to find your friends. This is a quick way for them to get all the contact information, which may also include birthdays and other more sensitive details.

Even if I were to never make a Facebook account, I could almost guarantee they still have my name, address, phone number, DOB, and maybe more.