The HN demographics would regulate things to the point of absurdity if left to their own devices. In the US they only reach critical mass to do so in affluent suburbs, so you get stupid local laws about lawn height and other attempts at legislating conformity. Occasionally they get thrown a bone by the federal bureaucracies or legislators on some meaningless issue that nobody will care enough to oppose. This is how you get lawn darts and random food products effectively banned (not that lobbying doesn't also result in odd small things being banned too).