1. Don’t be an asshole.

2. See Rule 1.

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

If you ask me this would be a waste of resources.

lemmiquette sounds like something from /c/cooking

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.

I’d argue it already does

Let’s just use netiguette.