Are you sure your observation is not a race thing? Ghetto gang bangers and their boom boom boom are ruining neighborhoods?
In the 60s, people used to move out when black people moved into white neighborhoods too.

In Ohio, there is no emissions testing. And every American city I've lived in has HUD money-inspired rules about supplying low cost housing in developments. Even the DC burbs, where real estate development (on the VA side anyway) has reached tentacles into state government.

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1984 300TD