Present that bit of information to a JWS and what would you expect from them in reply ?
But in reality its true and you can support that statement by even using the bible.
The WTS/JWS is just one of many organizations of anti biblical charlatanism endeavored around literature proliferation.
The JWS organization self identifies itself as the most righteous and faithfully adherent to the bible, yet when one examines the bible carefully particularly the words and teachings of Jesus Christ, there are obvious discrepancies and apostasy .
The operating leaders of the WTS going back to the late 1800's were not pressed to gain support and confirmation from outside sources for their own acquired theology as in Pyramidology teachings etc.
They were more pressed to make up their own teachings which in expectation were appealing to the general public at large , such as " Christ has return a new world order to come ".
Great statements to make or position on the front cover of a magazine as it were but not faithfully adherent to the bible or the instruction laid out by Jesus in preaching his New Kingdom to come.
For most of the history of the WTS/JWS it was an organization that presented and preached a tainted false commercialized Gospel influenced more upon literature proliferation then scriptural accuracy and adherence.
Jesus in his own words said to stand away and be aware of false prophets and how to actually identify them.
So in truthful adherence to his words, you would have to identify the WTS as a false prophet from a scriptural sense.
Ironic as it is this same bit of information came to me out in service talking to a Pastor of another Church which I cant remember which nevertheless stuck to me for a long time.
So it would be truthful and honest to say that individual JWS forfeit their own salvation by being loyally attached and subservient to this particular false Prophet .