I recently flew across the country with a handgun in my checked bag. The handgun was in a locked gun case and the piece of luggage it was in was locked. I used a TSA lock, see an example at http://www.tsalocks.com/ , so that I would know if the bag had been disturbed. I had absolutely no problems the entire trip.
How exactly will a lock that TSA personnel can open at will stop or deter a TSA employed thief?