- First: I admire you, personally, and the company you have built.
But you and I know that, pursuant to the very laws and programs under which these requests are made that you are not - nor is any party to them - permitted to disclose either the existence of the program or that the request was even made. And that, indeed, unless parties are given explicit clearance from a controlling, duly legally competent, authority, all parties involved - when asked - are to deny their cooperation or the existence of the programs in question. That is, you (and Google) will - under these laws - never be charged with misrepresentation over the existence of these programs or your participation in them.
We know from prior reporting in the open press that the mechanisms by which requests for records and access are made and serviced are automated, with only - due to the intent of law - checks to make sure that the requesting authority affirms that the request is made for a legal investigation. (Google had an issue, if I recall correctly, with the PRC gaining access to these systems to making these requests.)
I don't blame you or NSA for the situation. All of you (Microsoft, Apple, etc) as well as NSA are doing what the Congress (presumably representing the US electorate) has asked you to do.
It is incumbent on citizens to hold their elected leaders responsible, through the legal means we have (by not voting for those who support such programs, and - more importantly - refusing to contribute funds to their campaigns) to bring sanity back to our national security apparatus.