The only person that i ever met who ever did and does that, was a grow man who, blindly, thinked the whole time, that things like Touhou Project, Warframe, Team Fortress 2 and other games were complete rip-offs of Megaman or Fantasy Star Online.
And no, he wasnt a troll, he, still thinks that... After 5 years of "Continuous fight".
Why? ... I don't know.