Previous occurances on hacker news:<p>* <a href="https://news.ycombinator.com/item?id=12026879" rel="nofollow">https://news.ycombinator.com/item?id=12026879</a><p>* <a href="https://news.ycombinator.com/item?id=2570269" rel="nofollow">https://news.ycombinator.com/item?id=2570269</a><p>* <a href="https://news.ycombinator.com/item?id=3452408" rel="nofollow">https://news.ycombinator.com/item?id=3452408</a><p>and some more..<p>I counted 19 times so far