What goes in must come out, right?
The question is on what level would we prefer it to come out?
Farting may not be “polite” or “socially acceptable”, but it’s definitely better to fart than to cheat on your spouse, right? But if your spouse frowns at you when you fart, and makes you feel like you need to repress your farts when you’re around them, then you’re eventually going to be so full of hot air that you are very likely going to need to get the hell away from them, and find a more accepting environment to fully express yourself so that you don’t, well, explode.
The problem with repressing your negative expressions is that that negative energy (mostly taking on the form of toxic hormones and other chemicals that “flood” the human system) has to come out of your body some way or another (or it will kill you and finally come out after you’re dead!). Now, the extra clever human brain/body does it’s best to sneak that negative stuff out into any place it can. It seeps out into all the other body parts, making you physically ill with headaches, back aches, colds, cancer, etc. And sometimes it even seeps out into other people, via your emotions and ideas. Because, when you don’t deal with your negative physical stuff at this most basic level, it tends to come out in your higher levels, starting with the emotional level and then the intellectual level, which is why we get broken personal relationships of all kinds, and then people like Ted Bundy and Osama bin Laden, and the whole “cult of snark” problem (think: shock jock radio) , and the ever increasing “Anonymous”ification of the world from the folks over at 4chan/b (think: the final scene of V for Vendetta, on the internet, and real).
So, because it’s just not possible to put only the absolutely pure things you need for health into your body (level 0 in the binary growth levels), we absolutely need to have the freedom to express whatever extra toxic/gifts that we have in us (level 1) so that we can keep our bodies as healthy as possible. Now it might sound “barbaric” or “primitive” or “just plain rude” to express our extra physical stuff in this day and age, it’s is definitely far, far healthier for everyone if we do so. So, it behooves us all to create environments that can take (and ideally USE) all of our personal expressions of extra solids, liquids, gases, and energy.
At the absolute minimum we need to have the freedom to poop, pee, sweat, spit, sneeze, exhale, stink, radiate light and heat, move, and make noises somewhere that is easily accessible to us, regularly.
When this ability to express ourselves physically is both common sense and a legal right then we’ll all be able to get rid of what we need to get rid of without things sitting around inside us making us effectively rot, internally, and/or “go bad” at some higher, and more unpleasant level.
Putting our shit in the garden compost is clearly much better than sitting in it all day long, or throwing it at our loved ones. 
Similarly, this also works with the negative emotional expressions that we might have. When a relationship (of any kind) has toxic stuff in it (coming from outside the relationship, such as from neighbors, the government, other family members, etc.), and the two individuals together have negative energy that wants to function as a single force pushing that external threat away from the couple, it’s imperative that that negative energy be not just allowed but encouraged to come out at that level so that it doesn’t get repressed and come out somewhere else, either damaging the couple itself, or at the higher, intellectual, level, where the negative energy can become a hugely dangerous force, as two heads are far better than one at coming up with terrorist plans.
And, if you look up one more level, you see that a whole culture that gets filled with toxic stuff will need to express that toxic stuff by aiming the negative energy – using all of it’s cleverness of many, many heads put together – to attack the threats from the other cultures of our world. (Hey, we know this! It’s called war, and religious fundamentalism, and militant atheists, and good old patriotic “us vs them” plots in the movies! Ooooh!) But look out, because if whole cultures are repressed from expressing their negative energy at that intellectual (cultural) level, then the negative energy seeps out at the next level, which is the level of life itself (spiritual), where the negative energy pops out as lovely things like nuclear weapons and pollution, which kill anyone and everything (including even the “us”es sometimes), not just those who are a threat to the culture.
So really, if we want to avoid extremely clever, and whole ecosystem-killing, or perhaps even whole planet-killing “tantrums”, then it really, really, really is crucial that we start working right now on creating a global environment where we can all easily express ourselves physically and emotionally, and even intellectually and spiritually, in the most useful or at least neutral way we can possibly think of.
Honestly, I do indeed prefer a fart, and even a punch in the face to the far worse alternatives. So, please, if you need to, fart, for the sake of the planet. And if your neighbor needs to punch someone, help them find someone who loves boxing, so that the polar bears don’t get stranded on tiny icebergs.
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