In a large Florida city, the Rabbi developed quite a reputation for impressive sermons, so much so, that everyone who was Jewish in the community came every Shabbat.
Unfortunately, one weekend a member had to visit Long Island for his nephew's bar mitzvah, but he didn't want to miss the Rabbi's sermon. So he decided to hire a Shabbat goy to sit in the congregation and tape the sermon so he could listen to it when he returned.
Other congregants saw what was going on, and they also decided to hire Shabbat goys to tape the sermon so they could play golf instead of going to Shul. Within a few weeks time there were 500 gentiles sitting in Shul taping the Rabbi.
The Rabbi got wise to this. The following Shabbat he, too, hired a Shabbat goy who brought a tape recorder to play his prerecorded sermon to the 500 gentiles in the congregation who dutifully recorded his words on their machines...
... Marking the first incidence in history of artificial insermonation.