Are you kidding??
Some of these have been direct statements from the Almighty in fulfilment of prophecy - look at what is says here:
re chap. 21 pp. 137-138 par. 33 Jehovah’s Plagues on Christendom ***
Outstanding in this connection was the proclamation made at what TheGoldenAge magazine described as "the greatest convention of Bible Students held during the ages." This convention assembled in Columbus, Ohio, July 20-27, 1924. No doubt at the direction of the angel that sounded the third trumpet, a forceful resolution was there adopted and later 50 million copies were distributed as a tract.
Oh yes???
In fact I could never see the point of them..it was just stage managed to try to make the audience go home thinking that something important had happened