Think about it, there are more satellites going up all the time and recovering old ones is very expensive. With the end of the shuttle program just around the corner the only way satellites will come down is as a fireball followed by a splash, or crash should it hit the 25% of the blue planet that’s covered in dirt.
Why is it every time I suggest that satellites have built in self destruct devices people laugh; just a small jet boost towards the sun and pop – no more problem.