Copyright is a very, very bad example here, since it's only enforced by aggrieved parties through the legal system. Would you want to take on Facebook in a cop

Copyright is a very, very bad example here, since it's only enforced by aggrieved parties through the legal system. Would you want to take on Facebook in a copyright lawsuit? And, as for these databases, how is anyone going to be able to tell whether, say, Facebook really has your data, or, if it's just gotten opaquely encoded somewhere in some ML algorithm?