I never do
I'd like to be an evil queen...but I'd need an army of cute fluffy things following me and obscuring my feet. Oh, and ominous mist. And violet contacts. Then I'd laugh manically whilst trick or treating, and produce from the folds in my cloak a cookie to give the provider of sweeties. I'd continue to laugh manically as I swept away, leaving the person clutching a cookie, looking bemused and wondering whether it is poisoned or not.