Agreed. He works for Chef.io though, so those who are concerned about his response should consider what relies on Chef, not GitHub. There are many open source CI platforms available so it shouldn't be difficult.
Even if he did work for GH, they haven't published an initial response, so your actions would be spontaneous.
I noted this in the edit to my post that I posted just before your comment was written (you were probably writing this when I posted my change). Given the sort of 'distributed' nature, and low managerial overhead of GitHub, this could well be considered a "they" post were it from a GitHub employee.
Even if he did work for GH, they haven't published an initial response, so your actions would be spontaneous.