I'm not sure if it's common. It depends on how the RWBY creators handle fan - created content in general. If they've only had this one instance of 'kicking out' fanfiction, then it's not common. But if there are underlying issues like copyright concerns that keep popping up, it could potentially become more common.
I'm not entirely sure specifically what 'rwby kicked out fanfiction' means without more context. It could potentially refer to RWBY (the animated series) having some sort of issue with fan - made fictional works, perhaps they were removed or there was some kind of ban on them.
He might first feel a great sense of despair and self - loathing. But then he could start training on his own, determined to prove the school wrong. He could look for a mentor outside of Beacon, someone who believes in his potential.
It could also be due to a false accusation. Perhaps someone framed him for something he didn't do, like stealing important artifacts from the school. And in the world of RWBY, if he was found to be secretly associated with a group that the school considered dangerous, that would also lead to his expulsion.
Xander could be a creator or an owner. Maybe he is the person behind a brand, a story, or a platform. And he kicked out fanfiction because he wants to protect his original creation from being overshadowed or misinterpreted by fan - made stories. It's also possible that Xander is a figure within a community who has a particular vision for the content that should be present, and fanfiction didn't fit into that vision.
Naruto might initially be shocked and hurt. After all, being expelled by his own family is a huge blow. But being 'godlike', he could quickly turn that pain into determination. He might decide to prove his worth and show his family that they made a big mistake.
Another possibility is that in the fanfiction, Spider - Man's identity was revealed in a way that put the entire Avengers team at risk. The Avengers might then decide to distance themselves from him to protect their own secrecy and safety. This could involve kicking him out of the group to avoid any further potential threats associated with his exposed identity.
I don't think it's a new trend. The relationship between the Harry Potter franchise and fanfiction has been complex for years. There have been instances in the past where the official side has had to deal with issues related to fanfiction, whether it's about copyright infringement or the portrayal of the characters. So this 'kicking out' might be just another phase in this long - standing situation rather than a brand - new trend.
One reason could be that he breaks a major school rule. For example, if he uses dark magic without proper authorization, the Gryffindor house might decide to expel him. Gryffindor values courage, but there are limits, and using dark magic goes against the values of the school as a whole.
It could mean that a person named Xander has removed or banned fanfiction. Maybe Xander is an administrator on a platform or in a community where fanfiction was not allowed according to certain rules.