Facebook question?

I feel like I'm still processing how these bizarre people think but learning much here. I have a question about Facebook use. My narc has an account but tries to remain hidden. He never told me about it but I saw him listed on his sisters friend list. Otherwise he can not be searched, messaged or friended. I have since made all of mine private and the profile pic one that is not a personal one of me. I don't think he looks anyway, but my question is.....if he did, does looking at pictures and updates provide any type of supply to him? I didn't immediately change my settings and some of my activity and holiday pictures had been posted as public. I don't want to give up my account and connection to friends but I don't want him to be able to get anything from me either.