I have never posted anything on FB concerning my alcoholism for a couple of reasons. First, most are not alcoholics and would never understand my insane way of thinking. Second, it is a social media site. Employers watch that type of thing, at least the company I worked for did. I'm currently unemployed and looking for a job. I would hate to be passed over for a job because they checked my FB and I had any references to drinking/alcohol/anger issues.
I do use FB to keep up with my 5 brothers & sisters and nieces and nephews. My "friend" list is very small. The only people I have "friended" are people I know in real life.