Sometimes, in fanfiction, Draco is injured while trying to prove himself. He has a lot of pride, and he may take on tasks or challenges that are beyond his capabilities just to show that he's as good as or better than others. This over - confidence can result in him getting injured, for example, attempting a very difficult and dangerous Quidditch move.
In many fanfictions, Draco could be injured during a duel. He is a Slytherin, and duels are common in the wizarding world. Maybe he underestimates his opponent and gets seriously hurt.
One reason could be to explore the darker side of the Malfoy family dynamics. The Malfoys are often portrayed as a rather complex family in the 'Harry Potter' series, and this could be a way to dig deeper into their potential dysfunctions.
One reason could be revenge. Draco might feel that Harry has wronged him in some way throughout their years at Hogwarts, like getting him in trouble or making him look bad. So, he decides to kidnap Harry as a form of payback. Another reason is that Draco may be under the influence of his family. The Malfoys might see an opportunity to use Harry for their own gain, and Draco is just following their orders.
One possible reason could be for comical effect. Writers might use this as a way to create a humorous and absurd situation, taking a usually serious or snobbish character like Draco and putting him in such a silly situation. Another reason could be for an alternate universe exploration. In some strange alternate version of the Harry Potter world, different rules and situations apply, and this could be one of them.
Well, it might be due to lack of interest from the writers over time. As the fandom evolves, new characters or storylines might become more popular, causing writers to shift their focus away from Draco Malfoy fanfiction. Also, some fanfiction might disappear if the authors themselves decide to remove it for personal reasons, like they no longer want to be associated with that work or they have rewritten it into something else.
It's immoral. Molestation is a horrible act, and depicting it in fanfiction is wrong.
His injury might bring out new character traits. For example, Draco could become more vulnerable and show a side of himself that he usually hides. This could affect how other characters view him and interact with him. In the storyline, it could also lead to investigations. If his injury was caused by foul play, there would be an effort to find out who was responsible. This could create a whole new sub - plot in the fanfiction.
One possible reason could be a bludger hitting him hard. In Quidditch, bludgers are those menacing balls that are out to knock players off their brooms. If Draco wasn't quick enough to dodge, it could cause him serious injury. Another reason might be a collision with another player during a high - speed chase for the snitch or the quaffle. Maybe an over - enthusiastic Gryffindor player, in the heat of the game, accidentally crashed into Draco, sending him tumbling off his broom.
One possible plot is that Draco Malfoy discovers he has a non - pureblood ancestor through some ancient family records. This shatters his view of his family's pureblood lineage. He then struggles with whether to keep this a secret or reveal it, fearing the reaction from his family and the pureblood society at Hogwarts.
One possible reason could be a misdirected spell during a battle. In the heat of a fight, Harry's spell could go awry and accidentally kill Malfoy. Another reason might be if Malfoy was under the control of a dark wizard and was about to do something truly terrible, and Harry had to stop him at all costs, including taking his life.
One reason could be love. Draco might have fallen deeply in love with Harry and his possessiveness is a way of showing his strong feelings. He doesn't want to lose Harry to anyone else.