Hi, Happy New Year.
I understand we all feel ownership of our ancestors and there are privacy issues, that is why I generally don’t have people in my tree after about 1900, even if I know more.
It is a challenge though if you are trying to chase down a knotty relationship or distant DNA connection.
I do all my own research, I use hints as just that, almost all trees have errors somewhere, but I hope that by sharing my research I may help others find their own roots.
You say the person concerned is not remotely related. Have they got a bit of tree wrong, or might it just be a link you don’t understand? Is it possible there is an NPE you can’t see from your side of the wall?
Fundamentally it comes down to what we are willing to share, I have chosen to share 40 years of research by me and my parents in the hope that it will help others.
This includes photos of my great grandmothers cousins in the 1860’s, it was a big family, so unless you make your tree, wide you would not say they were related.
This approach means that I now know relatives all over the world, and have recently obtained a photograph of my great great grandmother in about 1900 from a relative in Australia, the only such photograph I have.
Happy Hunting