Sure! There’s nothing wrong with putting on a costume, trick-or-treating, and enjoying the company of your friends and family. Of course, some misled people take the holiday too far and make it more satanic than it should be. However, that’s not a reason for the rest of us Christians to be scared away.
When we decide to be afraid of the devil we give our power over to him. What message does it send the world if we, as Christians, are afraid to admit to the reality of evil? It sends the message that we’re not sure who wins this battle of good vs. evil.