Too Long; Didn't Read
I do have to admit that I like the concept of cyber-self-defense, but in my opinion, it is just not feasible to do. There are just too few professionals, too many insecure devices, and too much at risk if individuals or companies started 'hacking back.' It is with this that the Defender's Dilemma will always exist: the attackers will always be one step ahead of the defenders.