What's stopping them, or anyone else, from trying this sort of thing again through an unidentified agent to circumvent the enhanced scrutiny that they would rec

What's stopping them, or anyone else, from trying this sort of thing again through an unidentified agent to circumvent the enhanced scrutiny that they would receive otherwise? By making harder just for the NSA you achieve nothing but a false sense of security. Instead the process needs to be more rigorous and scrutinized for everyone.