It may be my intimate familiarity with crappy data management and retention regimes, both in DHS and outside of it, but regardless of how I've acquired this perception: I have zero faith that TSA can/will protect the data they're collecting from abuse, misuse, and inadvertent disclosure. The people manning these checkpoints are simply not adequately trained. Real law enforcement officers can't handle privacy and data retention. It is unreasonable to suggest that the TSA could do a better job with more sensitive material.