Something like ZUN, while drunk on sake, breaking into a beer factory and peeing into the beer
? *walks out to get brain bleach*
On a more serious note, it doesn't really matter whether what ZUN does to be involved in an incident is not newsworthy outside of Japan because the Western fandom keeps a close watch on what goes on in the Eastern fandom. If Japan is in an uproar over a scandal involving ZUN, the rest of the world will follow suit.
Personally, I feel ZUN is more likely to die from overwork than from shame, but since Japanese society tends to value honor it's still a possibility.