You can't argue that you want your own rights respected when you are willing to violate other's rights as well. This is exactly the reason why courts will impose blood transfusions on witness' children if a Doctor pursues it; because courts recognize a child may not be capable of making an informed choice, especially when the parents are trying to make that choice for them.
Are witnesses manipulated into making bad decisions? Sure, no one can argue with that. But in the end, adults have the right to make their own decisions, no matter how stupid we think those choices are. By that same token, we could choose to accept a blood transfusion because we believe that it will allow us to live on the planet Zanudu where we will live alongside Baal as spiritual reindeers. A person shouldn't lose their individual right to make their own choices just because their beliefs don't make any sense to us. In their mind, they are making an "informed" choice based on the information they themselves have CHOSEN to accept. Whether or not we believe it is an "informed" choice matters for sh!t, unless we can determine they are not fit to make their own medical decisions. But that should not be based on our personal opinion.
The day we start thinking we have the right to make other people's choices is the day we ourselves have become the very organization we condemn so much on here.