Here, the dominant ethical norm seems that the Watchtower's copyright is relatively less worthy of protection because they use copyright to do bad things, and the copyright owner's rights are relatively worthy of protection because Ray and Cynthia Franz chose her to carry the copyright forward.That's because there is a clear difference... and one recognised in law too. Let's reframe the substance of the OP to show the problem.
The British PM writes a very, very long letter which calls into question his ability to govern the country. A newspaper gets hold of the letter. Can the British PM expect to be able to exercise his very real and very valid copyright over that letter to prevent publication? If you live in a country where the answer is 'yes', then you should be demanding a change in the law. In Britain, a judge would tell him where to put his complaint about broken copyright. There is no ethical dilemma involved.