> Eventually, I started weeding out people who fell below the level of a real-life friend, because I didn't want to share family photos with them. Facebook became a place to share kids' photos and see kids' photos from friends and family.

I'm fairly sure that the opposite is also occurring. That is, people who aren't interested in seeing a constant stream of your kids are weeding you out as well.

In the last few years, I've been aggressive in unfollowing people who post nothing but pictures and updates about their kids. It's not something I'm interested in seeing, and honestly I just can't identify with people who have kids. Seeing people who used to be close friends do nothing but post about their kids just reminds me that we no longer move in the same world.

The only exception is my cousin. I'm fine with seeing pictures of her kids, because they're family (in fact, I configured Facebook to send me a notification whenever she posts), but I'm not interested in seeing anyone else's kids.