#DataProtection: you can still be a #DataController of such shared data. But do rights apply well? No. Confusing interactions with the #HouseholdExemption and with #JointControllership, all discussed in the paper.

Controllers might try and draw on recent case-law by the CJEU in GC and others to claim they are effectively incapable-by-design. This is a problem as platforms both design the vision of the service they offer (e.g. what is the role of an OS) and the detailed implementation.