I'm all about privacy, but I'm really having a hard time understanding what all the fuss is over here. So they want a background check. Big deal - Given my specialized employment criteria, that's already been done pretty intensively. Fingerprints? Yeah, already in my FBI file and on file with several government agencies anyway (out of my control).
There isn't really any information that had to be submitted to TSA that the government doesn't already have on me.