Well, it changes everything. Without Harry, there's no 'Chosen One' to fight Voldemort. So, Voldemort would likely rule the wizarding world unopposed. The Hogwarts School might become a place that only teaches dark magic or is completely under Voldemort's control.
In the fanfiction, it might be that there was a powerful and unexpected dark magic curse placed on the Potter family long before Voldemort's attack. This curse was designed to target the youngest Potter, and despite the efforts of his parents, it couldn't be stopped, causing Harry to die as a baby.
One interesting fanfiction could be about baby Harry's first magical experiences even before he went to Hogwarts. Maybe he unknowingly made his toys levitate when he was really young, and his aunt Petunia was terrified but couldn't figure out what was really going on.
The baby could be the child of a minor character from the original series who was in hiding. For example, the baby might be the offspring of a wizard who was on the run from Voldemort's followers and unfortunately didn't make it, leaving the baby behind for Harry to find.
Yes, there are likely fanfictions where Harry Potter calls Hermione 'baby'. Fanfiction writers often explore different relationships and character interactions in the Harry Potter universe, and this kind of endearing or unexpected use of language can be a part of their creative interpretations.
The relationships that Harry was supposed to form later in life, like his friendships with Ron and Hermione, would never happen. And the whole wizarding world would be different. Without Harry, there might not be someone to stand up to Voldemort in the same way. So, the power balance in the wizarding world would be completely shifted. Also, the mystery around Harry's scar and his connection to Voldemort would be left unresolved in a way that leaves the story with a sense of incompleteness.
The potential impacts are numerous. Firstly, it can create a negative perception among the general public. People might start to think that the Harry Potter fandom is full of inappropriate and distorted ideas. Secondly, it can lead to a lot of in - fighting within the fandom between those who support the original values and those who might be interested in this kind of fanfiction. This can break the sense of community that has been built over the years. And finally, it might overshadow the real beauty and depth of the original series as more attention is drawn to this rather strange and inappropriate fanfiction.
If Harry Potter died at the Dursleys, it would be a huge shock to the magical community. First, the Dursleys, who had always resented Harry, would suddenly find themselves in a very difficult situation. They were supposed to protect Harry, but his death would surely draw the attention of the Ministry of Magic. In fanfiction, this could lead to investigations into the Dursleys' treatment of Harry. Magically, the protection that Harry's mother's sacrifice provided might be broken in a different way. And Voldemort, unhindered by Harry, could start to reshape the wizarding world according to his dark desires much more quickly.
Perhaps in the fanfiction, Harry Potter's death occurs because he tries to rewrite a powerful magic spell that goes horribly wrong. He was always known for his bravery and willingness to take risks in the original series, so this could be an extension of that. His death would then be a tragic consequence of his own curiosity and desire to push the boundaries of magic.
On the other hand, there are fans who appreciate the creativity of such fanfictions. They see it as a new take on the familiar story, exploring different themes and emotions that come with the death of the main character. It can also lead to interesting discussions among fans about the nature of the Harry Potter universe and how it could be different if he had died.