@Walter Hinteler,
That woman is a good writer.
I can see that those internet key items being together could be reason for interviews. I know the breadth of the exploration is a waste of time, but something might not be, one or more times. What a pickle jar the world has become, and I will agree with those who say we (US) are not sans blame and I see we act like it.
I haven't kept up with all the pro and con nsa arguments; I naturally want a system of rules (getting warrant or whatever) for reading missives. Finding out that I email people in California a bunch of times a year doesn't bother me. That's within the US that I want rules, rules kept. But I take it quests like that are close to ne'er refused.
Re the rest of the world, let's say a US person with very "fishy" interests (that must be hard, a lot of us have interests someone might call fishy) contacts a person abroad multiple times.. I'd think it appropriate to contact that country's security folk and have an agreement on listening, before listening. I know this is Pollyanna speaking.