Any idea what might have been going on? I know it can depend upon the neighborhood but I always try to stay in touch w/ my neighbors. I have lived in neighborhoods before though where people went out of their way to NOT know each other. I just like the idea of if a uhaul truck backs up to my door and I'm not the one moving, my neighbors might let me know. But then there's always the ones who refuse to look up too.
Stay safe....