Trolling Jehova’s Witnesses

This guy has just discovered the perfect way of dealing with those pesky Jehova’s Witnesses who go door-to-door spreading their “message of God”. I would attempt this myself, but it would be pretty awkward if those people turned out to be someone else.
I assume this rage comic is from reddit’s F7U12, but I wasn’t able to find the original there. Let me know in the comments if you know where this came from.