I'll briefly come out of my lurking retirement to hit on this one. Abby and I had been going back and forth in that black box thread trying to rationalize with the truthers why, in all that is good and pure on this earth, would a government professing the loss of the black boxes allow a museum to display them.
It pretty much came down the truthers buying into it because the government is dumb and has made a ton of mistakes. Basically, they were the only ones smart enough to realize what was going on.
That didn't work for me, so I simply emailed a guy at the museum (New York State Museum... not the Smithsonian). Ten minutes later, he replied and cleared the whole issue up.
Ten minutes is all it would've taken. But in the land of Twoof, when leading a flock of believers, ten minutes is enough time for them to wander off and stray. Best to keep them in line by spouting unsubstantiated claims, regardless of how easy they'd be to check.