Thats such a shame.
If you look in Germany, on some places in the Huertgenwald the woods were cleaned by authorities, they destroy everything!! I know somebody who has spoken to these guys and the only thing they take with them is a very, very(!) good helmet... all the others is going to the scrap yard. Once a time my friend seen a huge container full with american 75 MM cartridges... going to the scrap yard. He asked of 1 ore 2 of them for his collection, the answer was no.

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Eine Lichtung im Walde wo die Sonne scheint.
Eingeschlossen durch Bäume sind wir gefangen,
in dieser Lichtung Gottes...