Okay old wise ones
...if you were the South Korean government what would you do in response to North Korea blantanly shelling the tiny South Korean island?
My recommendations:
South Korea first and for most take care of the folks on this island
South Korea continue to show restraint and also continue with the military exercise with a bigger show of force
South Korea continue working with other countries especially 'all countries' pressuring China to further rein in this rogue countries government especially now the youngster I believe is in charge ...
...don't know what else can be done as this country and it's people are on the brink of non-existence anyway and unfortunately its again only a matter of time. I don't believe another war or conflict of huge undertaking is something this world can handle...
This is not a pretty scene IMHO and I can only hope North Korea stops with the BS...but that is unlikely.