Monday night’s adventure into evil with Rob Zombie and Marilyn Manson at West Valley’s USANA Amphitheater was a good way to kick off the cooling temperatures of fall and celebrate a month that is already obsessed with horror and devilry. It’s a safe assumption that Halloween may some day be more popular than Christmas, especially in a culture that continues to be obsessed with dark and scary imagery from the fun and silly to the downright gruesome.