This issue of wild growth lawns really has to dissolve down two points. Geography being one. Arid grassland terrain where, (guess what) grass grows would make ideal space for this experiment; but, the nightmarish undergrowth that natively springs forth from swampy or forested climes would need to be cultivated out anyways or else you would create blight. Vines can be rustic and cute, but they will swallow a house where I'm at whole. And my second point is the area that these people would seed with natural grass would need to be very large and spaced away from neighboring grass. Herb next door in your cul-de-sac doesn't appreciate the encroachment on his turf.