Dear Gerry -
The Holy Bible says, "Rather, that the things which the Gentiles sacrifice they sacrifice to demons and not to God, and I do not want you to have fellowship with demons. You cannot drink the cup of the Lord and the cup of demons; you cannot partake of the Lord's table and of the table of demons. Or do we provoke the Lord to jealousy? Are we stronger than He?" (1 Corinthians 10:20-22)
Also, "This is the message which we have heard from Him and declare to you, that God is light and in Him is no darkness at all. If we say that we have fellowship with Him, and walk in darkness, we lie and do not practice the truth." (1 John 1:5-6)
Halloween has ALREADY been condemned by the Almighty Judge, God, because it glorifies darkness, and in God there is no darkness. Jesus called the devil "a liar and the father of it." (John 8:44) The devil is the prince of darkness, and anyone who partakes of any aspect of the darkness has believed a lie from the devil and has chosen the devil over God.
"And have no fellowship with the unfruitful works of darkness, but rather expose them." (Ephesians 5:11) No one can say it better than the Holy Bible.