Let us keep in mind that as we boot up our own cyber sabres to rattle at China, et al., the USA and Israel are extensively attacking and, essentially, invading sovereign nations and breaching the international peace. I don't like corrupt, oppressive regimes any more than the next guy or gal, but maybe we should try just not creating, causing, supporting, or sustaining them in the first place. I really don't think that the actions our government is taking in our name is in any manner better than the very "regimes" they feel righteous to openly attack.
As with the unfettered use and expansion of drone warfare in a stupid, narrow-minded, degenerate manner; this type of wanton wielding and violence through cyber weapons will backfire on us. Who will no longer feel justified to use the very same tools against our own national grid and economy if we show no ability for restraint at using the nuclear option.
Just a few thoughts to keep in mind. You can't whine and cry once the shit you pull being an asshole is turned on you.