The most logical response would be to tell Michael Roddy* to throw together a Villains Somewhat Scary Halloween Party in DHS, plans for which have been sitting around, what, a decade? Instantly blow up social media, rake in lifestyler and tween money, pad up the park's attendance numbers in a Fall that will need it.
But the culture of fear permeates WDW. Same mentality that let's a snack bar manager sell out of Doritos halfway through the day but not order more because they might not sell. Fear of loss > hope for potential profit.
* (For those who don't know, essentially the godfather of modern HHN who now runs entertainment at DHS.)