I don't want to be seen as someone who is scorning this age old tradition, I throw myself into it every year making sure all the children in this small village in France have something when they come to my door. But in my confusion, I've just researched it further as I really don't know much about it or where it came from. Interestingly there's no mention of chocolate but more talk about the aforementioned sugar in the form of toffee related products. In France they mention that they used to put out milk by the graves of loved ones, with our holiday 'Toussaint' (All saints) tomorrow it makes sense. Ireland now have a baking tradition for Hallowe'en with a fruit cake.
The Hallowe'en food list from Wikipedia
So why has chocolate become a part of the trick or treating game? I'm just thinking of the supply chain, which starts in our neck of the woods around Abengourou and across Cote d'Ivoire and Ghana, thankful for organisations like Slave Free Chocolate who are trying to assist via chocolate companies, CREER in Abengourou to do more monitoring and educaton for the children involved in child labour.