The heart is a mystery. The line between belief and non-belief is marked by the fruit of one's life. Fruit requires time to cultivate and blossom, but we measure time in seconds online.
Digital evangelism offers the opportunity to reach the world. However, how can we be sure if the person visiting your church's website or responding to your ad is the non-believer that your ministry is trying to reach. What if the people you are reaching are believing Christians, happy about your message?