These lawsuits are interesting. It raises questions about who owns what data. FB says your data is yours but then if I share with or tag someone, do they then

These lawsuits are interesting. It raises questions about who owns what data. FB says your data is yours but then if I share with or tag someone, do they then get a right to that data? I'm not sure they are alleging copyright infringement. It's not clear to me what the law is here or what the law should be.