For me, it is not about shunning them back. It is about being disrespected and treated as a subhuman by my family and (hahaha) friends, and refusing to condone it.
It's so hypocritical. Yes, I love them. But that does not mean that I will participate in their phoney 'inclusion' of me in a funeral service. Why am I all-of-a-sudden a member of the family again, when they are grieving? The very next day, I would still not be welcome in their home for dinner.
Oh, I can get a hug today because YOU need one. But next week, when I am really needing you to hug ME, I am once again shunned. Hell, I can't even call you on the phone if I am suicidal, because you don't speak to me. So jerk me around, only be there when YOU want to be, forget about my needs EVER being met.
That is emotional abuse in my books, and I will not be a party to someone abusing me.