Not necessarily though. What I love about the ending is how it's a fill-in-the-blank, John Carpenter-esque open ending. Sure, the journal could set things in motion. However, it's noted in the book that Rorscach's handwriting is nearly illegible, resembling either a secret cypher or a jumbled mess of letters. And who is to say his ramblings wouldn't be dismissed due to his jail time and reputation? I always thought it was a great bit of irony (yes I'm certain I'm using it correctly) that Rorschach, a character defined by his uncompromising black and white viewpoint, is in reality an ambiguity to those who don't know his backstory.