A victim of its own success! Parents and grandparents joined because Facebook was easy to use and all their kids were on it.
Before your aunt, grandma, and gradeschool cousin could join facebook, it was a place to be pretty open about having fun in college. That openness didn't work well with expanding the population to people who wanted to do what the cool college kids were doing because the college kids didn't want to share their weekend party plans nearly so much when grandma started to comment on them.
Your aunt didn't need to see that you were invited to a kegger on Thursday, and you didn't want her to.
How exactly is "inclusiveness" inappropriate here? Because it goes against the agenda that inclusiveness is always good? I guess using different synonyms for positive and negative connotations is one way to preserve doublethink.