The biggest question about social media and the church is not how the church can harness the power of social media for good ends while safeguarding against bad ones (useful as such discussions may be). It's how social media is changing what it means to be church.
There was a time when Reformation Sunday provided the occasion for Protestants to get together and say bad things about Catholics. Reformation services were conclaves of smug pronouncements. We had the truth and they did not. They felt the same way about us.
In the early 16th century, Martin Luther, assisted by enterprising printers unhandicapped by copyright laws, swamped the market with five pamphlets for every one put out by his Catholic opponents. Other Protestant writers poured out their own flood of sermons, treatises, polemics and devotional writings. For more than three decades Protestants dominated the recently invented printing press.
"I am the church, you are the church, we are the church together.” Every child who has ever spent a sultry summer morning at vacation Bible school has learned that song. It reflects the wisdom that the church is more than buildings or preachers or prayers or doctrines. The church is the people of God.