No.

reddiquette was always a joke, and it only kind of made sense when reddit was a homogeneous userbase of young nerds who were actually idealistic. once reddit became a target for interest groups, marketers, and etc redditique was just virtue signalling/plausible deniability.

any moral code falls apart as soon you have participants who are willing to exploit it rather than honor it.

the base code of redditiquttee was 'remember the human', well you can't exactly do that if your belief-set active denies the humanity of other people, which is how most average folks operate, and typically folks are only capable of abstract respect for other people who share their pre-existing biases and beliefs, which is precisely why reddit worked well when it was a bunch of 20/30 something college-educated male techie libertarians, but once it diversified that quickly fell apart. in a diverse environment people won't disagree with your ideas, they will disagree with your existence.

like colleges have honor codes, and those work mostly because the population of a college is self-selected and mostly demographically homogeneous, but if you are visibly distinct from other students at the college, the honor code won't apply to you.

1. Don't be an asshole.

2. See Rule 1.

lemmiquette sounds like something from /c/cooking

I'd argue it already does

We are, and there’s no way to prevent it. Writing it out wouldn’t help much, because people will find ways to violate the spirit of the law while following its letter, but who you talk to and how, who mods and how, who follows or blocks whom, all of these things feed into the etiquette of the ecosystem. We are, with every interaction, showing each other what is and is not tolerated.

Common decency should come naturally from the ones inclined that way and the rest don't probably care about such lemmiquette.

Let’s just use netiguette.

Do what you want bro who gives a fuck