I enjoy Facebook, and check in daily, as the people I befriend are mostly all believers and range from people I have known for decades and are far from me geographically, and are people that were once in my life and I love them. The purpose for me to post in Facebook is to bring glory to God and to show lurkers and unbelievers the reality of a life lived in Jesus Christ...what hope we have in Him, in this hopeless, wicked world. In this social setting, if one isn't using it to glorify God and to help build the Kingdom of God, then yes, deactivate.