Firstly, I am not quite sure what the beef is with Jehovah's Witnesses, given that every bible in existence has been edited to push whatever version a particular "Christian" cult wished to push, be it Catholic, Lutheran, Protestant, Southern Baptist or Latter Day Saints.
Secondly, the use of the word "censorship" I think is inappropriate. "Censorship" requires a powerful person or body (i.e. governmental) to deny a film, book, or art piece publication. What is going on here with regards to the OT versions are "edits". No person here has the power to say "I hearby declare that this is the only version you will ever see. If you attempt to acquire or view any other version you shall be fined and/or imprisoned and/or stoned to death."
It surely is semantics, but I feel that the inappropriate use of the term "censorship" dilutes the harsh nature of that which is legitimate censorship.
Just my thoughts.