Even though I know that the thing with ghosts, zombies, demons, vampires, skeletons, etc. actually came from the Catholic Church (being that I have just left the Catholic Church), I heard a lot of Orthodox priests speak out against Halloween, based on their misinformation from the Chick Tracts and Fundamentalists. I know that just because something is pagan doesn't mean it's damned forever. "Samhain" is not a pagan God, "Samhain" is a Celtic translation of the "end-of-summer". I actually watched an interesting video about the Orthodox Christian view on Halloween, listen to it throughly (very detailed):https://youtu.be/FRw8gFo66BE
Even though they do not consider something condemned because of pagan or non-Christian origin, they still look at the themes of Halloween as something disturbing. So in a nutshell, the priests in the video condemned Halloween. One priest in the video said that just because someone doesn't believe in Halloween ghosts, skeletons, and vampires, doesn't mean they're not dabbling with spiritually dangerous stuff when dressing up as or celebrating these things.
However, the real origins of the ghosts, zombies, skeletons, vampires being celebrated on Halloween actually came from the Catholic Tradition of "Danse Macabre", believing that Christ defeated death and they mock skeletons, vampires, zombies, ghosts, etc.with pride, knowing that death can no longer conquer the world. It can also be noted that Kirk Cameron said something similar about Halloween. Catholics also believe that in Halloween night, the veil between heaven, hell, and purgatory is at its thinnest, allowing ghosts and souls to creep into the mortal world. I still do not know whether its OK for an Orthodox Christian to celebrate Halloween. With all of that being taken into consideration, would it be OK for an Orthodox Christian to celebrate Halloween (particularly as in mocking death with glee and pride)?