I never really went trick or treating growing up, we would always go to Halloween festivals and then my 4-H club we would help out at them as game volunteers. So I want to know from you, how old is too old to go out? Well New Brunswick has apparently put in a new bylaw and curfew for trick or treating. This new law says that you’re not allowed to go trick or treating over the age of 16, and trick or treating must be done by 8 PM. Anyone found breaking this law can be fined $200. Unless you have a younger sibling or a child that wants to go trick or treating, I think having an age limit makes sense.