In case you are not aware take a look at this article : http://www.theregister.co.uk/2016/03/23/npm_left_pad_chaos/?mt=1458714695819.
Apparently the developer got angry and pulled all his npm packages and the whole Node ecosystem broke.
If NPM is free to take away any package due to copyright infringement how is this good for open source community? Is this act by NPM justified?