My uncle, my cousin, and my grandmother (100 yrs!) all passed last year. They are all on the JW side of the family. They have been shunning me since I was about 20 years old. I found out from someone on Facebook that they had passed... months after the fact. I'm not even DF or DA. My dad and my brother are DA. My elder sister is inactive like me (we refuse to act like they have any power over us by DAing.) But we all left at about the same time and the family has been shunning all 4 of us ever since. So, I doubt we will find anything out.
My brother was diagnosed with cancer this past year (we just found out he is in remission!). My younger sister is still a JW and she was so incensed and hurt that no one had told her about it. Dude... you are shunning us. If you want to know what is going on, you can't shun us. We can't be dead to you but alive enough to tell you we are dying. Seriously.
Aparently my mother was diagnosed with breast cancer for the second time in 30 years. I doubt I will be told if she dies. I know we wouldn't be welcome at the funeral. I think it makes a difference when everyone in attendance is JW. When it is mixed there is a lot more likelihood that people will behave nicely towards DF'd folks. When just a DF shows up and the rest are JWs it is a lot easier for them to be mean.
But I also agree that it depends on people. My elder sister and I never felt it was right to be spiteful and mean to disfellowshipped people. I never treated them like they were dead to their faces. I didn't treat them like they were dead behind their back either. I just was selective about how much time and what context of activities I spent with them.
Everyone deserves to grieve for their loved ones. Having said that, it is often just better to have a personal memorial outside of the JW funeral. The funeral is used in such a morally wrong way by the JWs to advertise their religion. That isn't what a funeral should be. It should be a celebration of a life and a chance for people to grieve.