The saddest thing is that most of these grandparents may not ever get a chance to see their own grandchildren again... not even at their deathbed.
In many cases, the alienated children are also forbidded (by the alienating parents) to attend their grandparents' funeral..
I do not know if the authorities' ever feel anything for such sad events. They can organise all the "Grandparents Day" events they want, but they are obviously either forgetting or omitting a big group of old folks out there who need help more than anything else in the world to connect with their own grandchildren. God help us all..