Really, it doesn't matter if they've broadly leaked or not -- from very early on in the "TSA must have your keys" period, theft by TSA agents from luggage was a noteworthy problem. The spread of authority may be a problem, but when the original authority isn't trustworthy in the first place, problems start long before any spread.
I admit to thinking more broadly, about key escrow systems in general.
The whole idea of a small set of physical keys and a large number of publically available locks is, of course, utter horse poop.
The logical extension of this "security" and "industry needs to meet law enforcement in the middle" to digital keys is terrifying. And I'm guessing it's how quite a few people think about it in the TSA and other organizations.
