Latte31 - The same thing happens in a 55 and over community. Thses types of communities were set up for elderly residents who do not want to see kids or teenagers loitering around their community.
They want to mingle with likeminded residents and do not want to hear a baby crying or loud children fighting.
It is really their right to have these communities for themselves. Also, many of these retirement communities tend to offer special pricing for these seniors that live there and other accomadations as well that make a 55 gated community attractive to these seniors.