Exactly, Sara65, how can people hurt those they love by denying them contact with family?
Grandparents are supposed to be role models to their grandchildren. People of good moral conduct, that can instill great virtues into their grandchildren's lives AND that their grandchildren can also look up to and learn from.
So it simply doesn't make any sense for anyone to expose their child to an adult who would negatively influence their child's life, or suffer any form of abuse (emotional, mental verbal etc) from watching their grandmother feud with, and belittle their parents. It's also not in the child's best interest to be around people who dislike, disrespect or undermine their parents. Or people who are constantly at odds with their parents. Or anyone that won't listen to their parents for any reason (including being asked to leave them alone after going NC).
This is not about "grandma," and how bad or sad she feels over being denied contact with family. This is about the parents maintaining thier sanity (from going NC) so that they are able to take care of those innocent grandchildren who need them. (Outside of abuse, children NEED their parents, and their grandparents - although some may beg to differ since something's that should be obvious just aren't). Parents do what's best for their children and not what's beat for their grandparents. And maybe that's why a lot of grandparents choose to brand NC as child abuse, in an attempt to brand the parents unfit and abusive. 
So when you ask how can people hurt those they love by denying them contact with family? the real question is why would anyone who loves their AC, continue to hurt them AND their family by insisting on unwanted contact, stalking and harassing them, and trespassing on the property?
This isn't about whose innocent (EAC vs estranged parents) and whose not. Again no one wakes up and decides to start their day by cutting off their great and loving parents. This mostly occurs after several unresolved issues, several attempts to fix the problem, continued retaliation from opposing party and evidence of no perceived change.
And asking questions with implications as to why we are here on this thread, and stating how we should start our own further beats the purpose. Wts the point of stating this? There's already an entire section for estrangement, and people (just like you are free to) should be free to comment anywhere without one or two parties trying to control the outcome of the conversation, by questioning other posters presence in the thread. That's another form of control and manipulation - factors that would exhaust anyone and lead to NC of it persists.
The blame is not automatically being out on the parent. The blame is automatically placed on any party that finds it too difficult to leave the departing party alone. And if it's the parent falls into these shoes, then yes it's their fault for again (since its not already obvious) no one should ever be harassed for ending any relationship. A lot of people claim the child's best interest, but I never see anyone advocating for children whose grandparents have conciouslsy opted not to be in their lives. Should AC also force these grandparents to be a part of these children's lives? For it would be in the child's best interest? Or does advocating for a child's best interest only come into play when the grandparent is hurting over being cut out? Which would then mean it's in the grandparents beast interest and not anyone else. Seems like some people want to put the children in the middle, for their own selfish agenda.
Its unresalistc to expose your child to something that you consider to be negative.
If one's own child doesn't even want anything to do with the said parent, how would it be in the grandchild's best interest to expose their beloved child to
whatever element their parents have, that their very own AC (whom they birthed and raised) doesn't even want to be associated with? Why would anyone expose their children to someone that they themselves don't want to be exposed to? And why would a grandparent want a relationship with a grandchild when they can't even reconcile with the child's parents? What message does this send to the children?
Someone needs to go back to Junior School himself.
