> Except that legally speaking bulk collection is even easier for NSA overseas where the Fourth Amendment doesn't apply
Treating notionally allied countries as free-fire zones is a curious definition of "easy". You run this kind of risk: http://en.alalam.ir/news/1528560
And for that reason, anyone with regard to the long term would deploy that kind of thing cautiously, if at all. But I have no idea if that applies to the NSA.
It's curious, I have seen this kind of comment on HN before, essentialy saying "US law doesn't apply in other countries therefore the NSA can do anything that they want there" ignoring that other countries have their own laws, often stricter in terms of privacy. My suspicion is that this is a particularly USAian myopia, which does not bode well for the NSA. Clearly they have gotten away with for a decade or more; but it relies on goodwill and secrecy; and those reservoirs are looking very low lately.