I can personally vouch for this happening, at least in my small part of the active duty world. However, the skeletons will usually come out of the closet after a checkride/deployment or two once they are back in a line unit especially in a really small community like my own. The sad thing is that even though you realize you've been stuck with a real tool that slipped through the cracks, often it's too late to fix. Some people are afraid to call a spade a spade and do the right thing because the "tool" that we are dealing with is above E-7 or O-4 in pay grade. It just proves my personal theroy that even though you can polish a turd, it doesn't change the fact that you are dealing with a piece of poop.