> So a technical implementation with its foundation on a social contract that has and can change at any time is to be trusted…
No, the "social contract" at issue deals with a different set of concerns than the "technical solution".
The "technical solution" addresses the issue of providing a mechanism to prevent the data sent from Facebook to you being exposed to third parties without you or Facebook intending that exposure.
The "social contract" addresses limits on intentional sharing by Facebook of data related to you (which overlaps with some of the information in the communications protected by the technical solution.)
The former is not the foundation for the latter, they address distinct, though related, issues.
No, the "social contract" at issue deals with a different set of concerns than the "technical solution".
The "technical solution" addresses the issue of providing a mechanism to prevent the data sent from Facebook to you being exposed to third parties without you or Facebook intending that exposure.
The "social contract" addresses limits on intentional sharing by Facebook of data related to you (which overlaps with some of the information in the communications protected by the technical solution.)
The former is not the foundation for the latter, they address distinct, though related, issues.