Originally Posted by
northpaw
I see what you mean about this particular online community, but I think Mistress Nomad has a point about problems of scale in the real world. To take it to an extreme, things may work swimmingly in a commune-sized group of 20-100 people, but once you don't have any idea what the others are doing, people tend to feel more isolated (and therefore develop a "me and mine first" attitude).
After living abroad, I've noticed that this is even more true in extremely mobile societies like the US. The job opportunities we have and the resulting "freedom" of movement also means that many people don't know if the guy they spot walking down the street is some ne'er do well vagabond or the family man from two doors down who moved in a month ago. This may seem alien to those of you lucky enough to live in relatively stable communities, but it's becoming almost the norm in many parts of the country.
In other words -- and sadly -- even the smaller groups or social units you mentioned are much less prevalent and relevant than they used to be. As jobs become less secure and we move around more, we're becoming a society of strangers, and the less we can rely on informal social groups or innate social instincts *alone* to a) encourage good behavior, or b) provide for the helpless.