>let's you protect your time and peace of mind

Not even close.

> If not, I will not let you know.

This is 100% completely on you, then. If you don't inform people you're being interrupted or that what they are doing is bothering you, they have no data to telling them to stop, and any energy you spend on silently judging them or being frustrated is only harming yourself.

No, it's on you. You can stop before you even begin by simply not interrupt and bother people for no reason. You're creating a problem and then blame me for not stopping it.

You realize _anytime_ someone needs to talk to you would qualify as interrupting and bothering someone else? Your expectation is unreasonable. Good luck with that.

Not the same thing. You literally want to interrupt me randomly on the street for entirely selfish reasons.

The people likely to talk to strangers unprompted are also likely to ignore those kind of messages. Anything that can lead to further conversation can be used (like "oh, what's worrying you?") so actually politely nodding and smiling without giving any footing to further conversation works better than being assertive.

> The people likely to talk to strangers unprompted are also likely to ignore those kind of messages.

No, that obviously false. They might be more likely, but they are certainly not likely.

I don’t think it’s false, much less obviously false. On one hand I have my personal experience about it, on the other you can see there’s only a small range in the “I want a conversation” scale where they want it enough to ignore the nonverbal signs that the person doesn’t want to talk but not enough to ignore the verbal ones.

Well, I don't see a "small range" at all. It's the opposite, extroverted pleople usually have better social skills than ones with social anxiety.

This requires social skills many HN users are lacking.