Great articles often start out with ad homenim. As far as Americans not being surveiled by the only methods he is concerned with:
http://www.guardian.co.uk/world/2013/jun/08/nsa-boundless-informant-global-datamining
Obviously Dershowitz is not a fan of Greenwald. Neither am I. There is good reason not to be. If you're interested, you might check out Dershowitz's fine book
The Case Against Israel's Enemies, which exposes Greenwald unequivocally as a liar and generally bad guy. But that's beside the point of this discussion, which is whether or not these searches constitute a significant violation of the 4th Amendment and our rights of privacy. Dershowitz, like me, would like to see this debated further, but in a moderate tone devoid of paranoid concerns.
You're the one who injected that into the thread. It seems counter productive to say you want a debate while attacking the only reporter who is trying to uncover these programs.
These programs that go much further than you and Dershowitz concede, yet you infer it is paranoia to mention that.
You keep asserting this, and I'm still waiting to discover what it means. So long as the principle involves collecting information in mass (megadata) I'm still not particularly concerned, no matter how "far" it goes. If it ever transfers into obtaining specific information on people without warrants, obviously that is cause for concern. Do you have evidence of the latter?
Metadata is not "information gathered en mass". Metadata = information about other data. For example...
I write a Word document and store it as a file. The content of the document itself (i.e. what you would see when you open the file in Microsoft Word) is data. The metadata about that document would encompass such things as Author Name, Date Created, Date Modified, Document Title, Size of File, etc.
The fact that the metadata is easily categorized into fields and searchable makes it specific. For instance, I could easily query the database and ask it to "show me a list of all documents written by timschochet, along with dates, titles, etc."