Aries: TPing and egging houses.
Taurus: Cosplaying for Halloween! (There's this girl who's a Taurus at my school, and last year we got to wear our Halloween costumes to school, and she came as I think it was Mikasa from AoT! (Attack on Titan)
Gemini: Buying a huge pack of candy instead of going trick or treating.
Cancer: They either wear an awesome, elaborate costume or not wear a costume at all.
Leo: Either is too lazy or hates Halloween, and just wears a shirt that says 'This is my Halloween costume.'
Virgo: Stressing on not knowing what to be for Halloween and probably gets a last minute costume like a day or two before Halloween.
Libra: Can't decide what to be, but ends up making their mind and being in of the first t have a costume.
Scorpio: Taking candy from little kids.
Sagittarius: Giving out the candy to little kids!
Capricorn: Scaring the living crap out of everyone.
Aquarius: Accidentally eats the candy they were supposed to give to the trick or treaters.
Pisces: Trick or treating!