I don't want to live in 'libertopia', where there are no rules at all, but zoning always had a component of keeping 'those people' away from 'nice neighborhoods

I don't want to live in 'libertopia', where there are no rules at all, but zoning always had a component of keeping 'those people' away from 'nice neighborhoods'. In the city I live in, right now there's a group fighting to keep duplexes out of their wealthy neighborhood. That has nothing to do with legitimate concerns about truly noxious smells or noises. And, ironically, the whole town grew up around a smelly, noisy, river clogging mill.