Just say what you mean people, stop making shit more difficult for everyone involved simply because "It's the socially acceptable way to do it", fuck that noise and fuck whatever insecure prick came up with it as a concept :V
The eternal struggle of "do I risk miscommunication, or risk being impolite"? Of course, phrased like that, you'd break social norms in a heartbeat if it meant you could get to the damn point faster. But if impoliteness = rejection, then... politeness is best, even if it leads to undefined behavior later? What is this bullshit?! I'd like a word with that prick. With my fists.
I'm not actually that aware of why it matters that much to be polite. I mean, I barely follow social norms, offline and online, and I seem to be fairly well accepted by others.
I've had it happen twice online; Bay12 (though I'm sorry that I've been participating less nowadays), and in a Discord server far, far away from here. I don't greet people, I barge in unannounced, and I generally act like I'm trying my hardest to be as detached as possible. If politeness mattered that much, why is it that I have 2 recorded instances of it not mattering? I got described as being "cool" and having "successful older brother vibes" on that server. That's a vote that I am viewed positively.
Of course, that's online. Offline, it seems to matter a bit more, but anyone perceptive enough already knows I "don't give a fuck". I've got that reputation among one (possibly toxic) friend group. It seems that the people I actually want to make friends with also don't give a fuck. Granted, the anxiety of meeting new real-life people is why I tend to stay online.