Yeah, trick or treat means give us treats or we'll egg you. Trick has never come up because I've always gotten candy. Though I have pulled a trick or two from the other side in giving candy. One was mixing in those chicken cube things (for soup or cooking to give flavor), they come in cubes wrapped in foil looking material. They basically look like chocolate. Another one is to wrap foil around ice cubes, save em for kids with paper bags, later they melt and their candy falls through the bottom.
Couple other one's though I forget them right now.