Alternate theory? That's a very popular interpretation of the film. Nobody notices anyone is dead because everyone looks the same and they don't care enough to

Alternate theory? That's a very popular interpretation of the film. Nobody notices anyone is dead because everyone looks the same and they don't care enough to learn who anyone is (the lawyer's response to Bateman's phone monologue), or nobody cares that anyone is dead (the landlord of the apartment Bateman murdered and cut up people in).