When you put it like that, what AI does in cases like this, is enable us all to treat each other like e.g. Google and Facebook (and any sufficiently big corporate-bureaucratic entity) has treated us for a long time.
We have reviewed your claims and found that [the account impersonating your grandma] has not violated our guidelines.
I hate this, my mom's account got hacked and now someone is controlling it for who knows what purpose. She had to make a new account and lost all her photos, old posts, messages, etc. Facebook was completely unhelpful