The watchtower is a document of corporation. Therefore they are an amaterial entity. How in heck does this scripture apply? Are we to storm some office building in new york, and rip up a piece of paper? BTW arent christian free from the rules of the OT?
Technically, it is not the Watchtower to whom this scripture (Deut. 18:20-22) can be applied, but the organization of Jehovah's Witnesses. Though the terms are often used interchangeably (since the physical organization and the "spiritual" one are closely intertwined), there is a technical difference. The text in question is the Biblical definition of a false prophet, and can reasonably be applied to any entity that claims to be a prophet of God. The WTS has made such a claim regarding the organization on numerous occasions, perhaps one of the best known being in the April 1, 1972 Watchtower magazine:
*** w72 4/1 p. 197 ?They Shall Know that a Prophet Was Among Them? ***
A third way of coming to know Jehovah God is through his representatives. In ancient times he sent prophets as his special messengers. While these men foretold things to come, they also served the people by telling them of God?s will for them at that time, often also warning them of dangers and calamities. People today can view the creative works. They have at hand the Bible, but it is little read or understood. So, does Jehovah have a prophet to help them, to warn them of dangers and to declare things to come?
IDENTIFYING THE "PROPHET"
These questions can be answered in the affirmative. Who is this prophet? The clergy of the so-called "Christian" nations hold themselves before the people as being the ones commissioned to speak for God. But, as pointed out in the previous issue of this magazine, they have failed God and failed as proclaimers of his kingdom by approving a man-made political organization, the League of Nations (now the United Nations), as "the political expression of the Kingdom of God on earth."
However, Jehovah did not let the people of Christendom, as led by the clergy, go without being warned that the League was a counterfeit substitute for the real kingdom of God. He had a "prophet" to warn them. This "prophet" was not one man, but was a body of men and women. It was the small group of footstep followers of Jesus Christ, known at that time as International Bible Students. Today they are known as Jehovah?s Christian witnesses. They are still proclaiming a warning, and have been joined and assisted in their commissioned work by hundreds of thousands of persons who have listened to their message with belief.
On other occasions, Watchtower publications have presented their own ideas as originating with God, for example when the prediction about the generation of 1914 was said to be "the Creator's promise" and "Jehovah's prophetic word through Christ Jesus." One who makes predictions in God's name that do not come true is clearly condemned by Deut 18:20-22.
Now, it is true, as you point out, that Christians are not under the old covenant. No administration of death would be carried out today against one who proved to be a false prophet, as would have been the case in ancient Israel. However, Jesus was explicit in predicting the rise of false prophets, and telling us to beware of them. (Matthew 24:24; 15:7-20) So persons seeking to follow Christ must at least avoid giving their allegiance to groups such as Jehovah's Witnesses, who clearly fit the description. Jesus said we would know them by their fruits, and the fruits produced by Jehovah's Witnesses have been a series of false prophecies over the entire course of their history.
Also, they focus to a great degree on devotion to the organization as a channel being used by God (though it is clear from their false prophecies that God is not using them at all). In doing so, they effectively qualify as false prophets under the further definition given at Deut. 13:1-5, namely the prophet who tries to lead the people to follow other gods. Again, under the old covenant, such a prophet was to be put to death. While the death penalty does not apply today, it would be the height of foolishness to actually follow such a person or organization.