There's an entire generation of young adults out there who have never experienced privacy of the sort we older'uns are accustomed to claiming as our birthright.
It might be argued that those folks actually have a more realistic understanding of the fact that one can't really hide in this day and age than we do.
Actually, I think it's a bit different. I think that many people consciously CHOOSE not to have the kind of privacy that some of us claim as our birthright, because they see no advantage to it.
Instead of thinking "I want to go through life with my head down, being as private and withdrawn as possible from other people and hiding myself from the folks around me," they think "I want to be visible; I want to reach out and make connections with other people; I want to be seen by the folks who are like me, and use these tools to form a community of people I'm close to."
