Well, we're not arguing rights, we're arguing etiquette, and, I think, consideration.
While almost anything can disturb someone, the idea of death is disturbing to all of us, to varying degrees. Therefore, it would be considerate, and I believe, polite, to avoid springing pictures of the deceased onto others without knowing if it would disturb them or not. I think would apply to other common triggers of distress, such as pictures of large spiders, or snakes. I might be really interested in such things, but I need to remember that not everyone is, and it is a kindness not to upset the people you are trying to communicate with.