*WARNING this article contains spoilers about Gossip Girl and You*
First and foremost,
Let's all be real with each other and admit that Gossip Girl's Dan Humphrey was a CREEP!
From being (arguably) OBSESSED with Serena to being the ACTUAL gossip girl, Dan Humphrey proves himself to be a real creep, perhaps one could even say a stalker that, interestingly, seems to be incredibly into blondes (Serena!!!!!).
Sound familiar?
Yup. Sounds like our very own Joe Goldberg with his victim Beck.
And just to continue with the similarities between these two characters, let's talk about how Dan Humphrey was obsessed with books/literature (especially the old-fashioned kind) and writing, just like Joe Goldberg.
Let's also talk about how Dan Humphrey shows stalker-like characteristics by taking on the role of "Gossip Girl," like COME ON that takes some major dedication and creepy-stalker skills, it also takes the right naive characters to let this pass (*cough cough* Serena and Beck). I mean no offense, but how dumb can you be? Beck more-so than Serena of course, at least she got out ... kind of.
Alright so here it is, my wildly insane conspiracy theory:
Joe Goldberg is really an adult Dan Humphrey. Dan Humphrey could not make it any more without Serena, so he began to go insane and dropped his role as Gossip Girl and changed his name to Joe Goldberg. Then, he got a job at the bookstore where he spent the majority of his childhood and, eventually, became the owner. Although he did not move to a different area, he was thought to be MIA by his old Upper East Sider friends since he was living under the alias of Joe Goldberg. In fact, he was a master manipulator and managed to make them believe he was no longer in the area. Furthermore, Joe Goldberg has all of these sneaky stalker skills from years of practice as the Upper East Side's "Gossip Girl." Dan Humphrey's years of rejection led him to become the creepy stalker that kills several people in the process of "protecting" the one he is obsessed with, just to ultimately kill the one he is obsessed with. It can be concluded that the psychological damage imposed during high school in the Upper East Side created this monster: Joe Goldberg... and the best part is that no one would ever guess it was Dan Humphrey.