OTB, why do you think there is no one in the grey area at this time? It's either God or Satan. Yes, I believe we can look at a person from the standpoint of either the fruit of the Spirit or the works of the flesh, but the scales can tip at any second for a person and they turn their lives around for the better.
What worked for me was to stop worrying about my family. Hard thing to do...right? I started having faith that it was in God's hands and He would see to it. I focused on doing my part of being a loving family member. Once I started doing that, it all slowly started to change for the better.
Of course if someone is so demonic that your life or health is in danger of course we may have to seperate ourselves physically from them but we can always have faith, hope and love for them. I think these are the most healing of all.
I have 4 more family members whom I'm praying and thinking good things about....all the rest have miraculously come to know their savior. All I did was be an example and love them. If they asked, I shared. Instead of worrying, I enjoyed my life and kept up the faith, hope and love.
I feel very blessed to be able to say my family have changed the family tree, but then again they must endure to the end...that's where the proof of their commitment will really shine and be the example to the next generations to come.