On my FB account, I regularly change past posts to private, keep a very low profile and use all the security features I can. So much so that when one aggravated (Antifa) person checked out my profile she wondered if I was real person or just using a fake account. I like to keep people guessing and don't like to reveal much personal information. I had an incident a few years ago, where some jerk decided that he didn't like my comment and was able to gather enough intel on me that he researched my private information and published it online as some sort of cyber bullying revenge. He even tried to get me fired from my job just because he was "offended".