Really don't agree about the hallucinations being a cheap trick or a gimmick. That's been the road we're heading down since day 1. I'd say not to bring your assumptions or experiences with hallucinations on other shows/movies to this. It'll just **** with your expectations.
To me the hallucinating is some of the best part of the show. It shows you how severely mentally ill Elliot actually is. There's no Mr. Robot without it, literally
As for these theories, meh. I expected it sooner than later to infect this show/fandom. A whole wave of wild theories to get ppl talking or read too much in to while they miss actuall clues and great storytelling along the way.
Also was on the now cancelled show, The Returned.