No matter what some Neopagans and well-meaning Fundamentalists think. (Unfortunately, even some Catholics fall into this, see here, https://adamcharleshovey.blogspot.com/2016/10/what-to-do-when-your-pastor-is-wrong.html). Now, there are causes for concern. Tarot cards and Ouija boards are major issues, but trick-or-treating isn't going to send you to hell.
That said, I think we need to take back Halloween to its Christian origins, not its alleged Pagan origins. Anyone with me? People think Christians are scary anyway, let’s show them what it means to be a soldier of Christ. I’ve actually gotten Bible verses going trick-or-treating. Let’s do it! Give them verses on the Eucharist to show their parents!