Public domain Korean satire is actually pretty new - until around the late 1990s, you could be arrested for doing that sort of thing (LOL MILITARY DICTATORSHIPS DISGUISED AS DEMOCRACY). :3

And while Koreans can be dumb about protests (KOREA-WIDE CANDLELIGHT PROTEST ABOUT ... BEEF IMPORTS), not to denigrate Hetalia, most Koreans could care less about some Japanese anime. Korean internet dumbasses =/= Korean protest population. Koreans are even tired of the Dokdo/Takeshima/Liancourt Rocks thing, and that was a big button-pusher earlier in 2008 too.