I recently deleted over 100 'friends' that were all people I had known previously but have no contact with now.
I had the frame of mind, and still do, that Yes, I did know these people. But a long time ago and no contact with them now other than reading each other's status updates vis FB.
Therefore why would I want these people seeing pictures of DS, my current life and knowing what I am doing when they know nothing of me in RL per-se.
Think nothing of it and carry on as usual