I ride the subway every week. I have found that the walls around people in that social space have become all but impenetrable. Eye contact is avoided. Facial expressions are flat and devoid of emotion. Occasionally, while reading an advertisement above the heads of passengers opposite me which solicits subjects for a depression study at a local medical center, I fight the urge to direct my fellow riders' attention to the ad above them.
Is this just post-911 ennui? I do not think so.
Boundaries are necessary in a civil society and in healthy relationships between friends or family. Yet, in this society, which is increasingly uncivil, the boundaries erected by individuals against social contacts with strangers are not symptomatic of health. Rather, these are walls built out of fear. And the fear is quite justified, when teenagers are carrying illegal firearms and all the mental institutions have been emptied onto the streets.
My practice is simple. I try to remain open in social situations, yet I also respect the boundaries obviously erected by those who are afraid. I do intervene when I see criminal behavior. I report it or directly address it. Recently I told a teenager to stop defacing the interior of a subway car with a permanent marker, for example. He was so humiliated, he sat like a turnip with his head bowed for the next several stops when I left the train. Part of practice for me entails doing the work of determining the boundaries and responsibilities of being a responsible citizen, friend or family member. Avoiding that work is irresponsible and will only make matters worse for everyone.