It’s a bit of a conundrum. On the one hand, I quite appreciate the Norwegian custom, where people walking along the street thinking their own thoughts won’t be accosted by perfect strangers saying “Hello” or “How are you?” and apparently expecting some response. A most annoying habit. On the other hand, I can see where such interactions even between strangers, when the strangers live in the same neighbourhood, do build some sense of community. My current compromise is to ignore people unless they greet me, but return a moderately civil nod, without so much as the freezing glare that would usually be my minimum response, if they say hello. But I’m not convinced it’s the ideal approach.