I don't know how fair this is but will just say that the first thought that jumps to my mind here is that being surprised at a cryptographer advocating for deniable messages is a little bit like being surprised at a medical researcher advocating for effective antibiotics. It probably never occurs to either of them to question the legitimacy of their moral stance.
I certainly could be wrong. What’s the case for repudiation? Is making blackmail harder really the cryptographer’s mail argument for why repudiation is a benefit?
I didn’t see a more convincing argument in the blog post. If there is a technical reason why repudiation is beneficial, I would be grateful for an explanation.
