But is he truly a Sigma? The 2020s have seen a proliferation of strange memes reflecting the often-bleak tone of the decade. Published Feb 19, 2023 While "sigma male" characters such as Patrick Bateman and Tyler Durden are extremely toxic characters, they serve a great purpose as cautionary tales. Tyler Durden, Patrick Bateman, Travis Bickle, Joker: these characters are all clearly disturbed and toxic human beings.