Well let's be fair, we're talking about him because he didn't rest on his laurels, he's been out there doing more and more.
Personally I thought it was hilarious, you can hardly be more gentle in the process of 0wning a system like that and as I recall he did try to warn them beforehand.
But here we are talking about him 1 year later. I think he probably shouldn't have done it, but on which side of the pg/YC line of creative subversion did his stunt actually fall?