When my father lost a family member a prominent elder chastised him for grieving. He told my dad that it was setting a bad example for others and it showed a lack of faith in the resurrection.
I agree with that statement. I've seen it done. More than once.
Maybe we can look at this in another way. For many, including myself, when a JW family member dies, it is not accepted that they are gone forever. That is denial. We can look at denial as a stage of grief, but to remain in the denial stage is not healthy either. To remain in denial means we never accept the death and if we never accept it, then we cannot properly cope with it and move on.
My JW hubby grieves long and hard over the loss of his mother. It has had the unfortunate effect of pulling him farther in to the society. Even though his mother was never a JW, he knows she has a hope in the resurrection.
That kind of ties in to what I was saying...we deny that we won't see them again, therefore we grieve to a point but never come to grips or acceptance with what must be.