1. This kind of government thug behavior on a college campus is immediately counterintuitive, but makes complete sense after you think about it. All that DARPA money goes somewhere. It's a bit like being shocked that Ma Bell would be an integral arm of state security.
2. This story should be shouted far and wide so that people attending these type of talks will record them on their phones. Make this corruption of our institutions openly apparent, rather than isolated rare incidents easily written off. Make it known that the surveillance-collaborators are not appreciated in the least. These moles won't even return phone calls because they know what they did is indefensible with anything other than "policy".
3. I wonder about running a DoS attack on universities with such agreements, either to make NSA etc have to issue formal declassification of the public documents (unlikely), or to force the colleges to reconsider their agreements (and therefore their research foci). Imagine "I guess we have to destroy every computer in this lab too. And the network switches. And the Internet router, again".