I had a bday last fall and always thanked each post to my FB feed for their best wishes. I went down the line and made sure that all were responded to. A week later posts from friends that were dated on my birthday were showing up on my feed that I hadn't thanked. Not just 1...many. That's when I realized that something was fishy so I did a test. I posted something on my feed and then asked my DH if he could see it. He couldn't. He did the same. I couldn't see his post. I then put 2+2 together and realized that I'd had a lot of posts that no one liked or commented on. He always liked or commented and so did our kids. In talking to friends, they then noticed the same things on their feeds. That's when we left FB. No regrets. Our stress levels dropped dramatically and we spent less time with our faces in our phones.