Is this really a big deal? They were doing exactly what NSA was supposed to do. We moved from NSA should not spy on everyone to NSA should be toothless ...
Spreading malware is a big deal, and I am sure many people would get quite upset if important US infrastructure was targeted. What would the reactions be if the 911 system got hit by untested malware, or some traffic control systems crash because of spying activities. What repercussion should the US have received if the Iranian uranium enrichment had exploded and thrown fine radioactive dust into the environment? Wou…
That's usually the point of this sort of work, yes. Espionage isn't just about acquiring information, it's about spreading false information, and dragging your enemies through the mud.
I don't approve of this shit, but "the them" have been up to it since forever, and the answers to your queries are a straightforward: "None", "No", "Yes" - unless someone else's intelligence agency outwits them, and has a media mouthpiece that can't be drowned out by chaff.
Edit: Your post got me thinking about Chernobyl and Reagan. The CIA had a programme to export defective technology to the USSR - which (apparently) culminated in http://en.wikipedia.org/wiki/Siberian_pipeline_sabotage
One has to wonder. Yes, I'm aware that the questions as to how Chernobyl are well answered, and all the rest, case closed, etc. - but one still has to wonder. Nothing should be trusted 100%.