It certainly would be an interesting revelation, if some professor did speak out. But I can understand that such would be very difficult to do. To be effective, there are more or less two routes:
1) Press: A mathematician would need to be able to explain their work to the press, without stating what their (or others) work could accomplish if used in the wrong way, but such that the press is able to understand the significance of it. That's not too easy.
2) Self-publication: Like Charles Seife, to write their own article about their experience, and manage to draw enough attention to it. Again, here there needs to be enough content to catch attention, but it is perhaps easier to propose 'connect-the-dots' theories and not have them misquoted. But publicity isn't exactly a mathematician's strong point: typically word stays inside the math circles and doesn't travel much farther around society.
…Or maybe someone who is very geeky and well connected in the press, digital and mathematical worlds designs a 'mathleaks' site for mathematicians to offload potentially interesting discoveries, and geeky journalists (potentially crowdsourced) translate that into newsbits. But somehow I suspect that is far too specialized, and not monetizable enough, to be realized.
From One Former NSA Worker to the Rest: It’s Time to Speak Out
Most people don’t know the history of Von Neumann Hall, the nearly windowless building hidden behind the engineering quadrangle at Princeton. I found out my junior year, when, as a bright-eyed young math major, I was recruited to work at the National Security Agency. Von Neumann Hall was the former…