Well, if Sirius Black hates Harry Potter fanfiction, it could lead to a divide among fans. Some fans might respect his view and be more critical of fanfiction themselves, while others might disregard his feelings. Also, it could potentially limit the creativity within the fan community as people might be afraid to create content that could be seen as disrespectful to Sirius Black's character.
The consequences could be quite significant. Since Sirius Black was an important figure in Harry Potter lore, his dislike of fanfiction might discourage some writers from exploring certain themes related to him. It could also cause some tension within the fandom. Those who are very attached to the idea of staying true to the original characters, like Sirius, might argue with those who enjoy the more creative and sometimes unorthodox takes in fanfiction. This could lead to a fragmentation of the fan community, with different groups having different views on how to handle Sirius Black's character in relation to fan - created content.
One consequence could be that Harry becomes more isolated. If he hates the Order, he may distance himself from them, which means he loses a group of potential allies. This could put him in a more vulnerable position in the wizarding world.
One possible reason could be a misunderstanding. Maybe some false information was spread about Harry that made Sirius believe he had done something unforgivable. For example, if there were rumors that Harry was involved with dark magic in some way, Sirius, who has a strong aversion to the dark side, might be quick to disown him.
There could be personal consequences for Harry as well. He might face opposition and even threats from those who want to protect the status quo in Magical Britain. His friends and family could also be affected, either by being targeted or by being caught in the middle of the conflict between Harry and the establishment. However, this could also make him more determined to fight for what he believes is right.
In fanfiction where Harry is Sirius Black's son, the consequences are numerous. Firstly, Harry's inheritance would be different. He might have access to more of the Black family's wealth and heirlooms. Secondly, his relationship with other characters would shift. For instance, Hermione and Ron might see him in a new light. The whole dynamic of the Order of the Phoenix could also be altered. Sirius would be more protective and involved in Harry's life, which could lead to different strategies in the fight against Voldemort. It could also change how Harry views himself and his place in the wizarding world, as he would now be part of a different family legacy.
He might avoid any events or communities related to magic fanfic. He won't be interested in reading or discussing them.
One possible reason could be miscommunication. Maybe Harry does something that Sirius misinterprets as a betrayal or a stupid mistake, leading to Sirius lashing out.
He could lose his friends. In the original story, his friends stand for good and oppose black magic. If Harry starts learning it, they might turn their backs on him. Also, he could be ostracized by the wizarding community. The wizarding world has a clear stance against black magic, and Harry would become an outcast.
It could also cause a stir among the portraits in Grimmauld Place. The other portraits might side with Mrs Black and start to give Harry a hard time whenever he is in the house. Or, some portraits might be secretly impressed by Harry's courage and start to question their own long - held beliefs.
One possible consequence could be his expulsion from Hogwarts. Using black magic is strictly prohibited in the wizarding world, and the school has a zero - tolerance policy. Another consequence might be the loss of his friends. His friends, who uphold the values of good magic, might not be able to accept his use of black magic.
His relationship with Jiraiya could be affected. Jiraiya has a strong connection with the toads, and if Naruto hates toads, it could create a rift between him and his mentor. This could lead to Naruto losing an important source of guidance and support in the fanfiction.