There would likely be chaos. SCPs are often dangerous and unpredictable entities. Their release could mean destruction of the surrounding areas, harm to innocent people, and a general breakdown of order.
Well, in most such fanfictions, it could be due to his magic going out of control. Maybe a spell he cast accidentally interacted with the SCP containment systems in a way that disrupted their normal functions and led to the breach.
In fanfiction, if Harry Potter is depicted as causing the breach, it could lead to a whole new set of adventures and challenges. It might result in him having to face the wrath of the wizarding world authorities, like the Ministry of Magic. He could be on the run, trying to clear his name and figure out how to fix the mess he supposedly made.
The unique elements often include the blend of two very different universes. The magic system from Harry Potter and the abnormal, often terrifying entities from the SCP Foundation. For example, a Dementor could be compared to certain SCPs that drain life or emotions.
Well, the SCP Containment Breach original story revolves around the idea of containment failure. The SCP Foundation has these facilities to keep the SCPs in check. But something goes wrong and they start to escape. It shows how these strange and often extremely dangerous things interact with the world outside their cells. There are different types of SCPs, some are more like creatures, others are objects with strange properties. And as they escape, they cause mayhem and the people in the Foundation have to deal with it, and so does anyone unlucky enough to be in the area.
By simply looking at the facts. 'Harry Potter' was published years before SCP even existed. So it can't be a fanfiction of something that didn't exist yet.
The consequences of inappropriate Harry Potter fanfiction are not to be underestimated. It can alienate a large portion of the fan community. Many fans view the Harry Potter series as something that has positive values like friendship, courage, and love. Inappropriate fanfiction can distort these values. Moreover, in a community that has a significant number of young fans, it can be a form of bad influence. It can also lead to internal conflicts within the fandom, with some fans supporting the creation of all kinds of fanfiction while others believing that inappropriate content should not be associated with the beloved Harry Potter series.
For fans, it means a loss of creative outlet. Many fans enjoy writing fanfiction as a way to explore the 'Harry Potter' world further, so they are disappointed. For example, a fan who had an interesting idea about a side story for Hagrid can no longer share it in the form of fanfiction.
For fanfiction writers, they may have to stop writing and sharing their works. Some might face legal penalties if they are found to be in clear violation of copyright laws.
On the other hand, for the official Harry Potter franchise, it might lead to a more focused brand image. Without the plethora of fanfiction, they can better control how the story and characters are perceived in the public eye. However, it also means losing out on the potential buzz and fan engagement that some positive fanfiction could have generated.
In a Christmas story, a breach of etiquette like not sending a thank - you note for a gift can lead to damaged relationships. The giver may feel unappreciated and become less likely to be generous in the future. Also, it can spread a negative feeling among the community.