I don't have much sympathy for the people the IRS is after, but I like the whole extraterritoriality kick our government's been on since the Clinton administration much less, so good, I'm glad the Swiss court told them pack sand.
The fundamental problem with the whole thing is that by claiming our law can reach out anywhere because something in another country 'Affects' our national interests can be turned right back around on us by 200 other countries with their own axes to grind. The worldwide pervasive impact of US commerce and national security interests opens up everyone in the US to suits or prosecution in foreign courts for any weird bullshit they want to make up and pass as laws.