Halloween to those who revel in the dark side is a time when the division of our world and their world is the least. Many use this time to further "bond" with demonic forces they have been "working" with by various rituals and by inviting those dark forces to full embodiment as a "thanks" and as a way for the dark to "enjoy" whatever debasement they can think to inflict on any innocent beings.
On the opposite spectrum Halloween is a time of dressing up, getting free treats and acting like fools. Commercialized, profitable, shameful.
If only the majority of populace were able to see the true nature behind this blasted "holiday"..