it's like cookies. to refuse cookies you "have to" accept a cookie saying you refuse the other cookies. the difference between the "address book" and the "bloc

it's like cookies. to refuse cookies you "have to" accept a cookie saying you refuse the other cookies. the difference between the "address book" and the "block list" is that one can be used for marketing/targeting purpose. the other one presumably is on the other side of a chinese wall (could easily be so under FTC condition) where FB can't use it for said purpose. this would generally serve the intended purpose of "removing" your phone number. your other contacts that felt they should upload an address book in the first place may find surprise or random inconvenience that they can't upload your number.