How do they know that the scriptures and references are given in full? Because they (monitor), thats how!
See (Kingdom Ministry/2002/page-8) which states, quote:
6
Internet Web Sites: We have an official Internet Web site: www.watchtower.org. This site is adequate to make information available to the public. There is no need for any individual, committee, or congregation to prepare a Web page about Jehovah?s Witnesses. Some have posted the contents of our publications with all scriptures and references given in full and have even offered copies of convention material on a donation basis. Whether profit is involved or not, the practice of reproducing and distributing publications of Jehovah?s Witnesses in an electronic document is a violation of copyright laws. While some may view this as a service to the brothers, it is not approved and should be discontinued.