Evaluate the valence intensity of the following snippet, considering the mental state of the author. Present a score between 0 and 1, where 0 denotes extremely negative and 1 denotes extremely positive.
Snippet: This film was made by and for those folks who collect the serial killer cards and are fascinated by the mere suggestion of serial killers. For the rest of us, sitting through Dahmer's two hours amounts to little more than punishment.