Jut take a look at this thread that is proposing NOT implementing a new design for Wikipedia. http://news.ycombinator.com/item?id=4352290 The presentation is very polite but the HN'feedback'? Woah!
The responses even from veteran HNers is nothing short of shocking. I can mildly 'understand' harsh responses from people whose present jobs are to design Wikipedia however, the extremely harsh responses from others is not constructive and leads to no learning whatsoever both for the designers and others.
This post is just an example of the latest trend of a new and unusually hostile HN.
Not cool.