lets assume you are an only child. And I a very distant cousin. I put online (when you would not publish yourself) your mum and dads marriage both of their mums and dads and all their grandparents. How would you FEEL. Now assume your name isn't smith but say Quidditch
how would you FEEL
I am an only child, so was my paternal grandfather. It would only bother me if details of those still alive were made public. well I did get a little upset by the tree in which i was killed off. I don't feel they are any less my family by others having them in my tree. I fact that person is likely to be some sort of cousin, how ever many back. It doesnt stop me having fun researching or stop me getting satisfaction from confirming my research is accurate.
I do have others in my tree who are not blood relatives. I am slowing building up trees for my daughters so I am researching their father's side.
I would find it incredibly bizarre if they had a random person's picture attached to someone. It could be a genuine mistake, they could have been told it was her in the photo.
I have an online tree but it is private and non searchable. I did make it public for about 10 days after feeling pressurised by another thread on here in which I was called "the very definition of selfish " for keeping my research private. My main reason for keeping it private is that I consider it a work in progress and it was drummed into me not to publish incomplete research.
I also don't think I've ever been rude to anyone. I always reply to messages. Not necessarily the same day if I've worked a long day.