If you're referring to the bullet points I made about what we know about Bumi, I said Katara said Bumi and Kya were "crazy" as children to point out that Katara was around for at least some of Bumi's childhood. I never explicitly stated that his "craziness" was grounds to consider him a threat to society and I apologize if I somehow inferred that. In fact, the only reason I used the word "crazy" (my initial draft read "rambunctious") is because I re-watched the episode and that's the word Pema used.

My Bumi argument relies on these main points:

1. I personally believe the person hiding behind the mask is going to have significance toward the main characters. Bumi is one of several proposed characters that fit that criteria. Again, this isn't a fact, I just feel there is a strong chance of this.

2. I believe Amon airbent (airbended?) in the episode Out of the Past. As he jumps through the fog when he's chasing Korra he is surrounded by a tornado-esque swirl of wind. As an artist myself, I acknowledge that this could simply be an artistic depiction of action designed to draw the eye in toward the villain, or that a waterbender could have parted the fog just as easily, but I think it looked too deliberate to not be bending.

3. Bumi is one of the few characters who legitimately has potential for airbending. I know he was "born an non-bender" but this could be explained away by some sort of spiritual awakening where a spirit unlocked his bending. He is still the son of an airbender and at least before he was born he held the potential. This is not a fact, but it is a plausible outcome.

4. The main competition directly countering the Bumi theory is Tarrlok's brother or a descendant of Zuko's family. Out of these three, Bumi is the only character we are 100% sure exists. The other main schools include Yakone (who I've already clearly stated my beliefs why I don't think it's him), or Koh/evil spirit. We know Koh exists and has a grudge against the Avatar. I think that theory has potential, but that's another debate.

5. Bumi is the only character I can think of who has both been confirmed to exist and would hold great significance to the main characters. All sides would feel betrayed by his revelation.

6. I do not believe Aang's vision to Korra was meant to solely warn about Tarrlok. I admit that the Yakone or Tarrlok's brother theories would also be supported by this thought, but the Bumi theory offers another added meaning to the vision. It is also the most cryptic explanation of the three which makes it feel more like spiritual wisdom to me, rather than Aang just handing Korra the information "Yakone is Amon!"

7. Amon has grey eyes. I personally have never seen a character with grey eyes who wasn't of Air Nomad lineage. Please correct me if I'm wrong.

8. Amon is incredibly agile--almost superhumanly so. Characters such as Suki and Ty Lee were also very agile, as are most chi-blockers, however Amon actually dodged lightning... I think this is an above average skill that an airbender might possess.

9. When Amon squares off against a bender he uses sidesteps and very circular movement to evade their attacks and often ends up behind his opponent with one hand on his opponent's back. While this could easily be explained as a necessary skill for a chi-blocker, it also very similar to Ba Gua, the style of Kung Fu that airbending is based on.

10. As the son of the only person in modern history who's ever been known to take a person's bending away (besides Amon), Bumi has potential as the inheritor of his father's energybending skills. Even I think this is a weak argument, but since elemental bending is passed from parent to child there is a possibility Aang genetically passed his energybending skills on to Bumi.

There are huge holes in this theory--mainly that we know so little about Bumi's history and his character as a whole. Until that mask comes off or other definitive evidence states otherwise I will never say "BUMI IS AMON!" or "BUMI IS NOT AMON!" There's simply no way to tell.

Bending is not nessecarily passed from parent to child. Katara is the best example of this since neither of her parents were benders. I'm not saying it's not possible that Bumi can bend enery but I don't think it is just because he is the son of the previous avatar. It doesn't seem unreasonable that Amon would be able to bend energy even if he wasn't the son of the avatar.

I thinkToph's parents werenon-benders too weren't they?

My point about genetics wasn't necessarily that benders pass bending on to their children, but rather that the form of elemental bending always seems to follow the culture the child was born into. Water Tribe people don't have airbending children, they have waterbenders or non-benders. The creators specifically told us that Mako and Bolin's mother was an earthbender and their father was a firebender and that's how they wound up with two different types of bending children. Likewise with Aang and Katara onto Kya and Tenzin.

I've wondered about that too maybebending does involve the environment since we have seen many volcanoes in the fire-nation. And all the animals that taught people to bend have only been seen in that part of the world (we haven't seen badgermoles in firenation). Then again only one person would have had to learn bending to teach other people. I wish the creators would give us an explanation.

The Lion-Turtle said in the "In the era before the Avatar, we bent not the elements, but the energy inside ourselves." This makes it sound like energybending is completely seperate from elemental bending, like it's a fifth art. If this is the case, maybe earth, fire, air, and waterbenders cannot bend energy, but the Avatar can because he is spiritually endowed to bend all forms. And if THAT's true, there might be some lineage of energybenders out there who don't know their potential. They've always thought they were non-benders because they couldn't bend any of the 4 known arts, but if taught the 5th they could do it. This concept actually raises my opinion of the Amon is an energybender theory.

Or energybending is a power not related to elemental bending whatsoever. Perhaps everyone is capable of it. The Lion-Turtle said "we..." who does that entail? Him and the other lion turtles? The badger-moles and the dragons? Humans? We can't be sure. I would be very interested to hear the creators' thoughts.

EDIT: Also, what else do you think someone could do with energybending? I doubt the Lion-Turtle and the others just went around taking away each others' bending...