On the positive side, he could use mind control to stop powerful villains without having to fight them physically. However, there could be a moral dilemma. He might struggle with the idea of violating others' free will, and this internal conflict could be a major part of the fanfiction's plot as he tries to decide when and if it's okay to use his mind - control ability.
One consequence could be that his friends start to fear or distrust him. After all, mind control is a very invasive power. They might worry that he could use it against them at any time.
When Naruto controls minds in fanfiction, it can have a significant impact on the Naruto universe. It can rewrite the moral code of the story. Is it right for him to control someone's mind? This ethical dilemma can create complex storylines. It can also make Naruto a more complex character, as he has to deal with the consequences of using such a powerful ability.
One consequence could be that his friends start to fear and distrust him. After all, controlling people goes against the principles they uphold. They might see him as a threat and try to stop him, which could lead to a lot of conflict among them.
One possible consequence could be that Naruto is ostracized by some in the ninja world. Since controlling blood is a rather strange and perhaps 'creepy' ability to some, they might view him with suspicion or fear. This could lead to him having to prove himself more often in battles and interactions.
One consequence could be that it makes him an outcast. Controlling the dead is often seen as a dark and forbidden art, so his friends and allies might be afraid of him or turn against him.
In some fanfictions, controlling the Kyuubi chakra might change Naruto's appearance. He could have some physical features related to the Kyuubi, like red - tinted eyes or a more ferocious look when using the chakra. Also, his relationships with others might be affected. Some might be in awe of his new power, while others could be afraid of him.
One consequence could be that it disrupts the natural balance. If Naruto isn't careful, his weather control might cause floods in some areas or droughts in others. For example, if he overuses his power to create rain, it could lead to excessive flooding.
There could also be environmental consequences. If Naruto isn't fully in control of his flood - controlling ability, he might accidentally cause damage to the local ecosystem. For example, he could disrupt the natural flow of rivers and flood areas that are important habitats for animals and plants.
One consequence could be moral. They would have to deal with the ethics of controlling the dead. Are they disturbing the natural order? This could cause a rift between them and some of their friends and allies who might not agree with such a practice.
One consequence could be a change in the school's power structure. If Harry controls Hogwarts, the old hierarchies might be challenged. For example, the influence of some traditionalist teachers could decrease. Another consequence might be a shift in the curriculum. Harry may introduce more practical and combat - related magic lessons, given his own experiences.
One consequence could be that it disturbs the balance of the ninja world. The dead are supposed to rest, and by controlling them, Naruto might be messing with the natural order. This could lead to other ninja clans or villages seeing him as a threat.