Blind obedience is what Witnesses are known for. Is there anything that even THEY wouldn't do, if so instructed???
Minimus if a Witness was ordered to change their opinion of faith and refused they would be disfellowshipped and therefore not be a Witness. If they were told to do something or to abstain from something and did not then they would be disfellowshipped and no longer be a Witness. If they are not propagating the faith anymore and just hide out to avoid the consequences of not following orders then they are just AWOL.
If they do not do as they are told then they are removed to keep the organization sanatized aren't they? So why the question? Everyone has a point where their conscience will not let them do what is wrong. It is their humanity. But when a person gets to that point then and listens to their conscience instead of men then they are no longer one of Jehovah's Witnesses. They are free.