One of the main arguments which Jehovah's Witnesses will claim when they approach you on your own doorstep, is that the divine name (YHWH - popularized as Jehovah, which even they will admit is an incorrect rendering), has been removed from the Bible being substituted with the word "LORD." This substitution was made by the ancient Jewish leaders, in order to prevent the name of God being used in everyday profane speech by God's people, as we hear today on so much television and in the Hollywood films, where the Jewish producers will often include the occasional "Jesus" or "Christ" as a profanity or as a swear word.
So returning to the Jehovah's Witnesses, they will claim that it is a sin to remove the sacred name (YHWH) or Jehovah from the text of the Old Testament. However, by comparing Psalm 14:2 in their latest 2013 edition of their NWT (New World Translation) with Psalm 53:2 in the same NWT, we can see that Jehovah himself, has removed YHWH (Jehovah) from the text of Psalm 53:2, substituting it with Elohim (God). So ask the next Jehovah's Witness whom you meet to explain this substitution by Jehovah himself to you?