Anglican pastor Steven Wedgeworth at Davenant has written one of the most comprehensive yet accessible essays on the objections and pros/cons of Christians and Hallowe’en.
For your consideration:
“But I don’t really mean to sound like a grinch who might steal Halloween from everyone. Insofar as it can be a feast in the true sense of the word, then it can be good. Invite those you know into true fellowship. And even a little trivial fun is fine too, in its place. But it’s precisely here where we need to keep it in its place, not giving it more than its due and not letting it become a temptation to join in with the deeds of darkness.”
Covenant Presbyterian Church 