I own a house in a New Jersey Township and a house in Pennsylvania HOA, the New Jersey Township is 100x stricter and has over 5,000 pages in the code/law book on land use.
The HOA has only 100 pages, they do enforce it, but I never heard of anyone going to jail because their grass was 1/4 inch too high.
Our is strict. Nobody has gone to jail here either. Some fines I believe. Most they can fine is 5,000 so it deters but not completely. People in general like to get away with as much as possible.