When I look back upon these memories, I do not recall any evil involved at all. It was a time to pretend, to laugh, and of course eat a lot of otherwise forbidden, candy! My parents were very careful about checking our candy, explaining how to be safe, and making sure this was a time that we were enjoying festivities and not encountering evil. One year I decided to go outside of the boundaries set by my parents and I walked through a haunted house that was not all fun and games. Inside I saw horrible visions and was the most scared I had ever been. I quickly learned why the boundary was put up and I never crossed that boundary again.
Bottom line for me is that when my son and I dress up and enjoy this time together, it is a memory builder that has nothing to do with any form of evil.