This talk discusses some of the computer intrusion sets that drive discussions of "active defense" ("hacking back"), including Mandiant's APT1 report (and their response), Citizen Lab's "Tracking Ghostnet" report, and the Georgian CERT's "Georbot" report. We then explore some common ethical philosophies, "integrity," "just war" doctrine, ACM's Code of Ethics, and the "Common Rule." We look at some legislative proposals (Berman/Coble, the Active Cyber Defense Certainty Act, and Georgia Senate Bill 315. Lastly, we discuss the Active Defense Continuum.