Firstly, I didn't sanction it.* They have no right to do this and should vehemently deny it. Anything to the contrary is deeply illegal (by the supreme court of the land), and needs to be met with sanctions and repercussions, up to and including dismantling the NSA.
Any level of transgression would make me take affirmative steps in this direction.
* by the way I'd avoid using the verb 'sanction' ever as it means both punish/discipline ('they were sanctioned by the court') or it means approve of ('the plan was sanctioned by the court') with just a grammatical hair of difference. to be clear, here, like you I mean the latter, 'approve of'.
It is illegal whether or not they acknowledge it. Much as you may dislike it you are - in my opinion - actively approving this by writing what you did above. Either that or I completely fail to understand your position.
What would convince you?
How bad a transgression would you need before you would say: "Hey, wait a moment, that's not what I had in mind when I sanctioned this!".