(Incidentally, I just passively used the new Webmynd search to find that link. I searched Google to find out about Websense. Then I decided I'd better include the link to the HN post in this comment. I was about to search for it, but it was already sitting there as the top HN result for the search I'd just done on Google.)
Does news.YC use hardlinks or virtual links in its HTML? If it's virtual links, I bet enough of us would be happy to point a domain at news.yc to throw off websense and the like.
https://qht.co/item?id=444958
Maybe they're using their filter.
(Incidentally, I just passively used the new Webmynd search to find that link. I searched Google to find out about Websense. Then I decided I'd better include the link to the HN post in this comment. I was about to search for it, but it was already sitting there as the top HN result for the search I'd just done on Google.)