Why would someone think Percy Jackson is an Ackerman fanfic?

There is no valid reason. Harry Potter has been around for a long time with a very distinct identity. If someone thinks this, it might be because they are making a very random and baseless association. It could be that they have some misunderstanding about the nature of fanfics in general and how they are related to original works like Harry Potter.

It's likely a misunderstanding. Maybe someone who is not very familiar with both series made a wrong assumption. But as we know, Percy Jackson is about Greek mythology and demigods, while the Demogorgin is from Stranger Things, two very different things.

It's probably a misunderstanding. Maybe some people who are not familiar with the series just assume it could be Japanese fanfiction because of its popularity and some similarities in the concept of a young hero in a fantastical world that they might wrongly associate with common elements in some Japanese fictional works.

Maybe it's a misunderstanding. Some people might be confused if they've seen some crossover fan art or fan theories that mashed the two together in a really strange way. But in reality, they have no real connection in their original concepts.

It's a wrong idea. Maybe some people who are not familiar with it misheard or misread some information. But as I said before, it's an American - made work.

It's a very strange thought. Maybe they are just misinformed or haven't really read either series properly. There's no real similarity between the two that would lead to such a conclusion.

Maybe they're just really confused. The two have almost nothing in common, but perhaps they saw some fan - made crossover art or something and got the wrong idea.

I can't really think of a good reason why someone would think that. Maybe they misread some aspect of the story? But as I said before, the story is all about Greek mythology and Percy's adventures as a demigod, not security.

No. Percy Jackson is a series about a demigod named Percy Jackson and his adventures in the world of Greek mythology. It has its own unique storylines, characters, and universe that are completely separate from an Ackerman fanfic which would typically be related to something else entirely.

There's no real valid reason for someone to think that. It could potentially be a very strange misunderstanding. Perhaps they heard some misinformation or just randomly associated the two without any proper understanding of what each character represents. Percy Jackson is firmly rooted in Greek mythology and his own series' plot, and Neal Caffery has his own crime - related storylines. They are so different that it makes no sense to think one is a fanfiction of the other.