Whistleblowing will probably only stand up to the test when the people being reported are in clear violation of some published law, regulation, duty, or standard.

Just because you don't like the way the TSA operates, doesn't mean there is grounds for whistle-blowing. You would have to show that they are violating their own procedures or executive directives on a wholesale basis and covering it up (the occasional isolated incident is normal for any organization, ex drunk airline pilots)

Due to the nature of their duties there can be no strict, formal performance criteria such as "prevent all transportation terrorist acts". Simply not practical, kind of like requiring the military to win all engagements, battles, and wars within 60 days or be court-martialed.

Not saying I think the TSA has their poop in one sock...