The consequences could be far - reaching. Naruto's actions might cause a rift between different factions in Konoha. Some might understand his reasons for protecting Hinata and leaving, while others would see it as a blatant act of disobedience. He would have to start from scratch in building a new life outside Konoha, all while being hunted or at least being watched closely by Konoha's forces. His reputation would be severely damaged, and he'd have to prove himself all over again in the eyes of the ninja world.
Well, one possibility is that Naruto has some secret mission or personal reason for leaving Konoha that he can't share. He takes Hinata with him because he has deep feelings for her and wants to protect her. Maybe he believes that Konoha is in some kind of danger that he can't prevent while staying there, so he decides to take Hinata and start a new life away from the village.
Perhaps Hinata leaves Konoha pregnant because she feels she doesn't fit in anymore. She may have faced discrimination or coldness from some of the villagers. So, she decides to leave and find a place where she and her baby can be accepted for who they are. She could end up in a community of outcasts where she finally finds true friendship and support.
Economically, there could be some impact as well. Naruto and Hinata are popular figures, and their presence in Konoha likely contributed to the local economy in some ways, such as through tourism (people coming to see the famous Naruto). Their departure might cause a dip in certain sectors that relied on their popularity, but it could also open up opportunities for new shinobi to rise and bring in new sources of income for the village.
The immediate consequence would be the destruction of Konoha, which is a major power in the Naruto world. This would create a power vacuum that other villages might try to fill, leading to possible wars and political unrest.
He would probably have to work really hard to repair the relationship. In fanfiction, Naruto's regret might mean he has to face Hinata's pain directly. Since Hinata has always been so devoted to Naruto, his cheating would be a huge shock. Naruto might try to be more open and honest about his feelings in the future. He could also face social consequences in the village. People might gossip about him and look at him differently. To fix things, he would need to show that he has truly changed and is committed to Hinata again.
One reason could be to find a more peaceful place. Maybe after all the chaos in Konoha, they just want a quiet life away from it all. They might also leave to explore the world and discover new things together, like new jutsus or different cultures.
One possible reason could be for his safety. Konoha is a well - protected village with many skilled ninja. She might believe that leaving him there would ensure he has the best chance at survival and growth as a ninja. Also, she may have some mission or obligation that forces her to leave him behind, perhaps something related to the greater good of the village or the ninja world in general.
In some fanfics, Naruto might leave Konoha as a child because he feels ostracized. Since he's the jinchuriki of the Nine - Tails, many villagers fear and shun him. He could get tired of the constant cold shoulders and decide to leave in search of a place where he'll be accepted.
In a 'hanabi steals naruto from hinata fanfiction', Hanabi might start by spending more time with Naruto. She could befriend him and gradually make him see her in a different light. However, this would be a huge shock to Hinata, who has deep feelings for Naruto. The story could then explore the consequences of such an action, like how the Uzumaki - Hyuga relations might be affected. Also, Naruto himself would be in a difficult position as he has his own relationship with Hinata, but Hanabi's actions might make him question his feelings.
They could leave because of a prophecy. Some ancient prophecy might state that they need to leave Konoha to fulfill a greater destiny elsewhere. So they trust in this prophecy and leave their home.