In a BusinessWeek ranking of America's 25 wealthiest towns, Mayor Caroline Bazzini of #1 ranked Brookville, New York on Long Island brags of her village:

And the town does its best to enforce that privacy. "There is no parking on any street in Brookville," said Mayor Caroline Bazzini. "So in order to come and be here in Brookville, you need to know the people."

Who says you need gates and walls to keep 'undesirables' out?

It reminds me a lot of the near-side, lakeside suburban communities of the Grosse Pointes, which abut Detroit, and St. Clair Shores along Lake Saint Clair, whose park systems are for residents-only. This means that the general public can not access the lakefront until they get up to Metro Beach in Harrison Township...16 miles northeast of Detroit.

In some cases, like the community of Grosse Pointe Woods, which sits directly adjacent to the city of Detroit, have even constructed physical concrete road barriers to block through-traffic between the two communities.

Passive-aggressive communities are the best communities.