My adult children's photos are already on the internet. I think all the ones I used are on Facebook.
The older I get the more convinced I am that privacy is no longer possible. I don't believe that the government guarantees it as a right any more in the way you and I used to enjoy it 30+ years ago. If you or an attorney type would beg to differ, I would love to hear about the protections available, that have not been dumped.
The best defense I can think of today is to live a clean and open life and our community build local protections.