I quoted from the book, Bowling Alone (The Collapse and Revival of American Community), on another thread.   The book is about us playing on Mudcat and watching TV instead of participating in community groups.   The first half, which I've read, examines how our stay away syndromes have been escalating since the 60s. I haven't gotten to the revival yet.

One part of the book reminds me of a brother who keeps telling me to not lock his car. It says, 'In short, people who trust others are all around good citizens, and those more engaged in community life are both more trusting and more trustworthy."

The next sentence reminds me of myself, 'Conversely, the civically disengaged believe themselves to be surrounded by miscreants and feels less constrained to be honest themselves.'   

Despite the title, bowling is one activity that is not in decline.