> I'd avoid registration and only introduce registration/renewal fees after (a period of 10-15 years)

After that initial period (whatever it is, maybe even longer), do you seriously think you'd be disadvantaged from someone using a non-humans-containing photo from your Facebook?

As for photographer holding the copyright, I am mostly pointing out a legal nuance today that is never enforced. And many of those photos you are in — selfies excluded — you don't have the explicit right to post (but neither does the photographer but not because of copyright).

As for them being taken by family, family members have sued each other for less :)