Earlier quoted context omitted.
If poor content and dumb newbie votes is grounds for banning, why the heck are techdirt and torrentfreak not banned?
Because nobody's made a big enough issue of those sites yet. (I wouldn't mind if they weren't on HN, either.)
Their "economics of free" series of articles is the single most useful online resource for dragging creative people into 21st century. You wouldn't believe how many musicians I know that spend their time worrying about selling CDs and getting a record deal... in 2012.
I consider them a valuable information source regarding the marketing and monetarization of zero marginal cost content.