It is not ethical. Hinata Hyuuga is a character, and creating fanfiction that involves abuse goes against the spirit of respecting the character and can also be disturbing to other fans who love the character for her positive traits.
Love and relationship are very common. Since they are a popular couple in the Naruto series, many fanfictions explore how their relationship develops further, like their married life or how they deal with challenges as a couple.
You can try fanfiction websites like FanFiction.net or Archive of Our Own. They have a large collection of fanfictions on various topics, including those about Naruto and Hinata.
They would probably be very proud. Despite their differences, both Hinata and Neji are highly skilled members of the Hyuuga clan. For the clan, watching them fight in the fanfiction would be like seeing the best of their combat techniques and kekkei genkai on display. They might also be analyzing their moves to see how they can further improve the clan's fighting style.
Well, the Hyuuga clan has certain expectations and standards. Their presence during the Hinata vs Neji fight in the fanfiction would make both fighters more conscious of these. Hinata, who has always been in Neji's shadow in the eyes of some in the clan, would be trying extra hard to show that she can be a great Hyuuga. Neji, who has always been seen as a strong representative of the clan's old ways, would be fighting not just to win against Hinata but also to maintain his status among the clan. Their fight is thus shaped by the clan's overarching influence.
I'm not sure if it's popular. It depends on various factors like how well it's written, how it's promoted within the fan community, and the size of the Hyuuga fandom interested in Sakura -centric stories.
In a Naruto pranks Hyuuga fanfiction, Naruto might use his typical mischievous tactics. For example, he could use his shadow clone jutsu to create chaos around the Hyuuga compound. Maybe he'd make clones that pretend to be important visitors and then act all silly to embarrass the Hyuuga. It would be a really funny scenario as the serious Hyuuga clan tries to deal with Naruto's antics.
Another theme could be Naruto's integration into the Hyuuga family. This might involve dealing with the clan's hierarchy and politics. He could face challenges from some members who are not accepting of an outsider like him, but also find allies within the clan. And sometimes, there might be a theme of Naruto using Hyuuga techniques in new and unexpected ways, which could be really exciting to read about.
One great 'Naruto Hyuuga Clan Fanfiction' is 'The Hyuuga's Ascent'. It delves into the inner workings of the clan, focusing on a young Hyuuga who discovers a new power within the clan's ancient secrets. Another interesting one is 'Hyuuga's Redemption' which shows a different side of the often - stoic clan members, exploring their emotions and relationships more deeply. And 'A Hyuuga's Journey' is also worth checking out as it follows a Hyuuga character on an adventure outside of the typical Naruto storyline, really highlighting the unique aspects of the Hyuuga Clan.