More ridiculous terrorism scare tactics used for attention.
"If you want to search for non-farmers who are discussing fertilizer..." No, I don't. Most likely you'll find a bunch of harmless pot growers and housewives trying to grow pretty flowers. People smart enough to really harm a well run society aren't posting details on the Internet. For the rest of us, these people will just take all the money you can from selling other people's (previously) private data.
No matter how hard we try, we will not stop determined individuals from attacking any society unless we effectively remove all freedoms from the citizens. I choose freedom over safety every time. The solutions to terrorism are NOT more or better surveillance, better technology, or more war. Real solutions include primarily the creation of a society that people don't WANT to attack. The reasons people have for suicide bombing and terrorism are usually pretty damn clear: they have nothing left to lose, and someone took advantage of them to direct their hate toward the easiest, most hated target.
Well, you want to fix terrorism, then address the real reasons for hating your society; it's pretty simple, and the only thing that really works.
Stories like this, about "scary" technology advances, remind me that as technology moves forward, the essential nature of the rights and freedoms that the US used to stand for and defend are more important now than ever before.
Here's what I'd like to find: A non-tax-cheat who is also a congress member. Oh, oh, how about a politician that still has a moral compass at all? A single honest politician? Even one? Let's find non-doctors charging Medicare. Corrupt cops. Meth distributors. Human traffickers. Murderers. People who built technology just to make money using other people's personal data, and try and frame it using terrorism scare tactics. Oh wait...