Author's Note: I first got the idea for this from a Harry Potter oneshot by YugiohObsessed, entitled "16 things the marauders aren't allowed to do". Obviously, the Marauders have a bigger legacy and reputation as troublemakers, but I liked the idea and thought it could apply to some of the Avatar characters. Then I did a search and found out a lot of people have made lists of things certain characters aren't allowed to do … but no one has written one for Avatar: The Last Airbender until now!

I'm going to label this "Complete," but I may go back and add things if I can think of more rules. If you can think of any that I should include, let me know in a review! I may include it, giving credit to whoever submitted it.

BTW, I think the list of Hogwarts rules should include, "Do not sing 'Magical Mr. Mistoffelees' from Cats when Mrs. Norris is stalking you."

Aang

~ Play with fire

~ Play fetch with Momo using Sokka's boomerang ("It's a tool, not a toy!")

~ Swear "For the love of the Moon Spirit"

~ Go to school (how ironic is that?)

~ Try to teach Zuko how to improve at Pai Sho

~ Ask Zuko if there's a reason why playing Pai Sho irritates him

~ Arrange a playdate for Appa and Nyla (what if Nyla tried to paralyze Appa – again?)

Katara

~ Use waterbending indoors, especially during meals

~ Go into the abandoned Fire Nation ship

~ Freeze Sokka's supply of meat

~ Cut off Prince Zuko's ponytail. Updated: Give Zuko a haircut (this would probably need to be done in his sleep, or if Toph buried him up to his head)

~ Go night swimming

~ Joke about Sokka's ex-girlfriend's "time of month" (in a way it's also my time, since my bending is at its most powerful)

~ Encase Toph's feet in ice

~ Blackmail Zuko with the threat of telling everyone how he looked in an apron, serving tea in Ba Sing Se

~ Use Suki's makeup

~ Attempt to teach Toph how to swim

Sokka

~ Put weapons on the dinner table

~ Eat Aang's pet lemur. Updated: Accuse Appa of eating Momo

~ Insult Prince Zuko's mother (Katara points out how we'd feel if he insulted our mother)

~ Cut off Katara's braid (what to do with the hair loopies?)

~ Flirt with Ty Lee (she started it!)

~ Trick Toph (or anyone else) into drinking cactus juice

~ Trick Toph (or anyone else) into thinking they've drunk cactus juice

~ Ask Zuko how he got his scar (and badger him, or threaten him with torture, until he tells)

~ Blame my so-called shenanigans on spirits; or, alternately, claim that I am or was possessed by a spirit while doing something I shouldn't have

~ Secretly borrow Zuko's broadswords

~ Write "I escaped from the Boiling Rock" on my shirt for the world to see (why isn't this acceptable even when the war is over?)

~ Call Zuko "Scarface" (especially to said face)

Toph

~ Use Aang's glider to crack nuts

~ Make up nicknames that Katara deems "offensive" or "inappropriate"

~ Ask Sokka what he sees in the moon (seriously, though, what happened with that girl?)

~ Wake the others up with an earthquake

~ Ask Katara what happened between her and her ex-boyfriend from Ba Sing Se (Who am I supposed to ask? It makes Sokka and Aang uncomfortable, and the other Freedom Fighters don't know any details.)

~ Bury Sokka in an avalanche

~ Attempt to eat dirt (Well, we breathe air and drink water, and I've even heard of fire-eaters … why can't our bodies take in earth?)

~ Give Katara an involuntary mud bath

~ Scam, gull, swindle, hoax, or cheat people

~ Attempt to perform acupuncture on anyone

~ Use this as an excuse to get Sokka to take his shirt off

~ Ride in Teo's wheelchair at breakneck speed

~ Inform Zuko that his tea is a far cry from what Iroh makes

~ Tease Katara and Haru

~ Ask Zuko why Sokka calls him "Scarface"

~ Inform Aang that I can feel his heart speed up sometimes when he's with Katara

Zuko

~ Cut off Azula's bangs (like I'm stupid enough to 1. Get that close to her, and 2. Risk facing her wrath for no good reason)

~ Set Azula's hair on fire

~ Speak out of turn (does this even need an explanation?)

~ Use any swears or curses in reference to Zhao

~ Touch Uncle Iroh's favorite tea set (why would I want to?)

~ Call Ty Lee a circus freak

~ Break up with Mai

~ Ask Katara for advice on how to make a betrothal necklace for Mai (maybe ask Sokka or Pakku?)

Ty Lee

~ Do cartwheels in front of nobles who aren't close friends

~ Flirt with Zuko (requested first by Azula, and later by Mai)

~ Attempt to braid Azula's hair

~ Teach chi-blocking to fighters who aren't Fire Nation

~ Play with Mai's knives

~ Flirt with Sokka (requested by Suki)

~ Put ribbons in Zuko's hair while he's asleep

~ Challenge Zuko and/or Sokka to a sword fight

~ Try to dye the Kyoshi Warrior uniform pink

Mai

~ Exhibit any skills superior to those of Azula

~ Dare Ty Lee, just because she'll be willing to go through with it

~ Play with knives a the dinner table

~ Carry any sharp objects within ten feet of Tom-Tom

~ Help fugitives escape from prison (technically, no one ever said I couldn't)