Why would someone think Percy Jackson is security fanfiction?

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.

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 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.

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.

It's probably a misunderstanding. Maybe the person is not familiar with both series well and just made a wrong assumption.

They might be misinformed. Maybe they are new to both franchises and just randomly assume a connection. It could also be that they've seen some fan - made mash - up art or a really out - there fan theory that got them confused.

It's likely a misunderstanding. Maybe the person is not very familiar with either the Percy Jackson series or what an Ackerman fanfic is. They might be misinterpreting some elements or just making a completely unfounded assumption.