Notanan, looking this conversation over, I see that your post about huge reactions comes right between your two posts about divorce. However, the "huge reaction" post does not mention divorce. So I can easily see where Smileless related it, instead, to her post about Mr. S' anxiety attack.
About GPs who are CO as the result of divorce - I agree that they should not be denied visitation w/ their GC just b/c the parents are no longer together. Nor should the children be denied contact w/ their GPs for that reason. But the GPs who complain of lack of contact usually are from the non-custodial parent's side. So that gets back to the question of who is responsible for ensuring the GP/GC contact, if anyone, their own AC or the custodial parent?
Also, from what Ive seen, there are some variations to this situation. In some cases, if one of the parents begins a new relationship or gets married, the GPs on the other parent's side of the family try to drive a wedge between the child and the new spouse/SO. Or they don't like the new spouse's/SO's childcare practices and make an issue out of it. Or for some other reasons, there are tensions between the new spouse/SO and the GPs. In those cases, some time apart might be make some sense.
The same is true when one parent has, sadly, died, and the remaining parent tries to push his relatives away. IMO, it can be cruel to intensify the loss by separating the GPs, say, from the GC and vice versa. Then again, some GPs try so hard to keep the memory of the deceased parent alive in the child's mind that they interfere w/ the living parent's efforts to move on and begin a new life. IMO, there is no one size fits all answer to these situations.