The Truthteller Line tells it like is. The Truthteller Line does not acknowledge you wearing your everyday clothes as "you" the costume. Or pun costumes. The Truthteller Line is not going to give you all of the mini "fun" Snickers from their bag without a fair trade.
In that same tradition, Gobsmack'd Greetings realizes that most kids running around as Transformers and Mutant Ninja Turtles just expect candy upon mindlessly trotting out an enthusiastic "trick or treat?". Then we dared to imagine a world where you asked for a trick instead. We suspect your house would be covered in toilet paper (at best) by the night's end. And we do all that imagining on 100% PCW recycled paper.