Black boxes would be of little use when it's certain that the aircraft was shot down.
It's improbable that the pilots noticed anything until they were lost.
As to the belongings being taken away.
Usually, belongings never make it back to the families, as it's mostly impossible to identify what belonged to whom. So most of it is destroyed anyway.
As for the bodies, I'm sure that they're being taken to a morgue or some kind of facility where they can be stored, pending arrival of the families to pick them up. I'm sure that they won't just pick them up and throw them on a truck just for the fun of it. I don't know about you but picking up severely damaged body parts isn't exactly how I would want to spend my afternoon.
Leaving them there to rot or to be eaten by birds doesn't exactly offer more dignity.
Apparently, people have seen them being carried onto refrigerated train cars to an unknown location.
The separatists are saying they think they have what could be the black boxes, but are not sure due to lack of knowledge.
I can't highlight enough much we're being manipulated and brain-washed by our Western governments' propaganda-machine. The "rebels" in question are only locals who have lead a quiet and miserable life until their goernment was overthrown and they are now seen as a nuisance. They are being bombed by their own leaders, much as what is happening in Syria.
The neo-Ukrainian government has carried out airstrikes on Donetsk airport under control of the local separatists.
http://www.telegraph.co.uk/news/worldne ... rport.html
Dmitry, a 19-year-old local who has joined the rebel fighters, said the Ukrainians deployed attack helicopters and jet fighters in the counter-attack.
“We’re always ready for an attack, that something might happen, but we had no specific intelligence or reason to expect this,” he said. “About midday helicopters appeared from the north-east, then jet fighters. I heard one or two large explosions, which sounded like the aircraft had dropped bombs. Then the fighting started.”
Dmitry, who said he headed to the airport to help the fighters shortly afterwards, described the battle as a Ukrainian army offensive in which government forces had the initiative, weight of numbers, and superior fire power.
So things are not as simple as "the rebels are bad and the new Ukrainian government is good".