Good article and timely, because they just did another big response two days ago: http://blogs.technet.com/b/mmpc/archive/2014/10/14/msrt-octo...

While this didn't involve a broad takedown of a public provider (as far as I'm aware), it did involve coordinated release of tools and more-targeted takedown requests through their semi-private "Coordinated Malware Eradication" program. On balance, I think what Microsoft is doing is a good thing, but public scrutiny and discussion of any organization/cartel that operates in secret is equally important.