"Koine Greek was the language used by writers of the Old Testament Greek Septuagint and the Greek New Testament. The original Greek New Testament was written in all capital letters, without spaces, punctuation, accents or diacritical marks."
http://biblescripture.net/Greek.html
Since the Jehovah's Witnesses interpret Bible verses using the ancient manuscripts, you would think that they would actually do what the writers of the Koine Greek Septuagint did and capitalize every single word in the New Testament.
Also, why is it that in the NWT there are certain phrases that have caps while others do not? It seems a bit inconsistent and hypocritical when they are so anal about the proper interpretation of ancient Biblical texts that they do not copy the same style as those writers of old.