North Korea, perhaps unwittingly, has proven once again the danger of poking the eye of your opponent. The results often boomerang, giving what you despise the publicity it needs to succeed.
The Interview, the satirical movie about two journalists recruited to assassinate North Korea's Kim Jong Un, drew sharp rebuke from the isolated, often angry North Koreans, which was followed by the hacking of Sony Pictures' computer network. North Korea denied any involvement, but the hackers threatened terrorist acts if The Interview was aired in American movie theaters.
The threats, compounded by movie theater owners refusing to show the movie, aroused First Amendment sympathies from President Obama to the people who buy movie tickets. Before you knew it, The Interview was a cause celebre and streaming on iPads. All the North Koreans and the hackers accomplished was to embarrass Sony Pictures with leaked emails and to promote a picture that may have been a flash in the pan.
As a PR campaign, this may be without parallel. As a smart move, it may go down in annals as one of the dumbest.
It certainly is a neon reminder of the risks inherent in negative attacks. Veering from your own narrative to criticize is an open invitation for the attacked to respond. What you are doing is essentially laying down a red carpet for the other side to tell its story.
Even if your criticism is warranted, the upshot of voicing it may not be worth the rush of righteous indignation you feel. [China dryly observed that while America values free speech, other countries don't. It might have added that countries like North Korea value suppressing information it doesn't like. In North Korea, no one was likely to see the movie anyway.]
The best advice is to stick to your story, even if the other side is taking shots at you. Once you turn negative, you lose control of your own story and that never is a good thing.