[PeterisP]

At least the European legal perspective is that yes, there actually is such a concept as "your data" that is inherently yours and you have certain rights pertaining to that data no matter what - allowing your interests and rights to that data override what others can do with that data even if they have it and obtained it legally. Legal possession of private data doesn't imply unrestricted right to use that data for all purposes.

For example, even if it was originally gathered with your permission, that permission can be revoked; EU GDPR will clarify the exact process of how that can be done.