For little kids, Halloween is one of the most exciting days of the year. They get to dress up as their favorite superhero or pop icon and then go door-to-door asking complete strangers for candy. The concept defies logic.
I was wondering, though, about the phrase "trick or treat."
Mirriam-Webster Online dictionary: trick-or-treat (intransitive verb)
Example: We all got dressed up for trick-or-treat.
Wikipedia, however, defines the Halloween activity as trick or treating. What happened to parallelism? Shouldn't it be tricking or treating?