How does a Holy Ghost haunt a house? Very quietly! Really. The Holy Ghost, or third person of the Trinity, is a part of the invisible God that is literally everywhere. You do not notice he is there because one, he is invisible, and two, he is Holy. So, he is very polite and gives you the free will choice to make, do you want to know the living God Creator or not?
If you want to have a better Halloween than ever before, say hello to God like your oldest ancestor. He cannot be carried home like a candy bar to eat, but he can be made a relationship with as easily as saying a simple hello.
God is Holy, so, of course, he does not approve of everything. Yet, he does approve of almost everything. Really. All you have to do is remind your preacher the Bible says to be as they that are to get judged by the law of Liberty. Not the Ten Commandments or any other legal cannon. If you want to get in good with God, stay harmless. Between anarchy and tyranny, there is harmless liberty as the perfect balance of the two scales. Too much liberty, and there is anarchy. Too little liberty, and there is tyranny. The perfect amount of liberty is allowing all harmless activities.
You can have a Happy Halloween collecting candy, going to a costume party, etcetera. Or, you can have a better Halloween, a Holy Halloween, getting acquainted with the living invisible God who is everywhere. He won't say boooo because he is Holy Ghost, but he is haunting everywhere, waiting to get noticed...