Vauban is very special and strange even for German eyes. But one thing is abundantly clear among many German communities:
The egocentric individualism where all the problems you produce are offloaded to some ephemeral society funded by taxes you don't want to pay is not sustainable unless you exploit external communities around you.
Conversely if you need to do laundry in your apartment building on a holiday because you're a single parent, that's an outrage. The person leaving all the racist and xenophobic notes about respecting local traditions is a model citizen.
Yes, you can't behave like an arrogant a-hole, people will complain and call services/cops on you. But if you follow few simple rules which can be summed up as 'be respectful of others and laws in the country', you can have a great time since respect goes both ways.
The assumption that people living there are intolerant of babies and families is false.
But if I threw out 200 of them per month, that would be my own thing. Nobody frowns, complains, cares or anything. People just go about their lives in pretty sensible ways.
In Geneva, I can throw trash in Migros plastic bags if I want, nobody cares. No clue about current Zurich, 10 years ago I didn't pay anything neither.
The areas of Baden, the former state Freiburg was part of, and Swabia e.g. were for decades the only areas in Germany were the otherwise urbanite-higher-ed focused Green Party had success with rural/small town voters.