Not everyone is as eager to embrace Twitter's emergence in worship services. John Piper, pastor for preaching at Bethlehem Baptist Church in Minneapolis, Minnesota, believes there is a proper time and place for Twitter. But we should also preserve no-tweet zones. "Don't tweet while having sex," Piper says. "Don't tweet while praying with the dying. Don't tweet when your wife is telling you about the kids. Multi-tasking only makes sense when none of the tasks requires heart-engaged, loving attention."