There is a long tradition of grandmothers showing pictures of their grandchildren. Is that now banned or does it require prior notice in writing by each child? Does she have to wait until the child is an adult and can provide legal authorization?
An analogy in scrapbook terms would be if grandma walked into a public square and put photos of her grandchildren onto a billboard, and every person who walked up to see them can peel off a copy, with no limit to the number of copies that can be peeled off this way.
I was comfortable being naked around people I knew and trusted.
My grandparents didn't always give a shit about my comfort levels and shared pictures of me in various states of dress with others.
I think I should have a clear and cut right to decide if I'm comfortable or not. Especially when I voiced those concerns as a kid.
Also, few years ago, grandma needed to be given picture by parents. She would not snap picture parents did not wanted, because cameras were not something you normally have with you all the time.
The internet is relatively young; there is no “tradition” of grandmothers posting pictures of their grandchildren on Facebook publicly (not just to “friends”).
Online privacy is an entirely different beast. The world is still iterating on how to deal with it.
I have never heard of the long tradition of grandmothers publishing their grandchildrens' photos in a newspaper or handing out photo leaflets.
They usually show those pictures to a few friends. In person. In their photo album at home.
(The GDPR doesn't cover that, obviously, because it is meant to address the rather new phenomenon of world-wide audiences)