W3W is an amazingly cool idea... on the surface. Once you scratch that surface, it has lots of issues, ranging from inconveniences to critical. The HN crowd is likelier to dig into a cool idea like this and surface a few problems. All it takes is adding hype to a couple of semi-serious issues to rub a certain type of hacker the wrong way, which leads to more digging, which leads to more problems being found, and it spirals from there.