I could see what my BIL posted because it was on my son's post(which did show up on my wall) I blocked my husband and SIL months ago, plus my profile is locked up tight, and I'm not searchable.
I need to see if I can block BIL even if I'm not his friend. And yes, he did start drinking heavily in high school, so that explains matters with him, my AH didn't start drinking like he does now until he was an adult.
When DS got home from school, I had him delete the post. Maybe it will send a message to BIL, but I doubt it.