Because I detest this day soooooo very much, here is some more info on why we (American's) have adopted some of the traditions of Halloween and where they have derived from. It took conviction and seeking on my part, to find these things and it has set me free! Even bobbing for apples has a root of evil! Please read!
Halloween Origins and Customs
History traces Halloween back to the ancient religion of the Celtics in Ireland. The Celtic people were very conscious of the spiritual world and had their own ideas of how they could gain access to it - such as by helping their over 300 gods to defeat their enemies in battle, or by imitating the gods in showing cleverness and cunning.
Their two main feasts were Beltane at the beginning of summer (May 1), and Samhain (pronounced Sah-ween) at the end of summer (Nov. 1). They believed Samhain was a time when the division between the two worlds became very thin, when hostile supernatural forces were active and ghosts and spirits were free to wander as they wished.