Why is that the bottom line? Why is that a good outreach? By your own reasoning, then you must think that Mormon or Jehovah Witness forums are also great outreach, as would one by Westboro Baptist church. People talking ABOUT Jesus is not the gospel. It is not worship. Looking at a picture that people may perceive to be Jesus is not the gospel, nor is it worship.
"And how are they to hear without someone preaching? And how are they to preach unless they are sent? As it is written, “How beautiful are the feet of those who preach the good news!” But they have not all obeyed the gospel. For Isaiah says, “Lord, who has believed what he has heard from us?” So faith comes from hearing, and hearing through the word of Christ."
Scripture does not say that faith comes from a chalk drawing of some man's idea of what the Savior looked like before His death, or people sitting at their computers "talking" to each other.
“Preach in all things you do and if necessary use words.”
Unexpected service to others is a great sermon. It has worked for 2,000 years.