> I feel like your conception that “ignoring people either consciously or through technology is rude” makes more sense in higher social trust situations.

Yes, but I meant that the more people who block everyone out by default, passively and indiscriminately, contributes to social rust rather than trust. Ignoring or especially telling some people is not inherently rude or bad, but conducting yourself as though everyone is de-facto untrustworthy is a problem that doesn't seem likely to be solved by passively blocking the world out.

Like I added, I don't know why I'd pay to live somewhere where I'd prefer not to interact with anyone. If the place actually does suck, then I should do everything in my power to find somewhere that sucks less.

If you have social anxiety or ADHD, those are personal issues that need to be managed, but I still don't think it's generally a good idea to pick the easiest, least superficially confrontational method to signal that you don't want to talk to anyone.