As you may know if you've been to a site, visiting a crash site can have a tremendous impact on ones awareness and understanding of this time period and can provide quite an education. This was part of the price of WWII as well as the Cold War. Many of these people have been forgotten and the history lost. At many crash sites today all that remains is a burn area and a few small pieces. One area that needs to be addressed in aviation archaeology and in the recovery of aircraft is ethics.
Many people take home a few souvenirs from their visit.
If everyone keeps doing that, the sites will disappear. Most ethical people would not take home a piece of pottery from Mesa Verde National Park. It is a shame to see how these sites are disappearing. The difference between what is at the B-25 in the Rincon Mountains of AZ today versus what was there several years ago is astounding. It is still a great site only because of the large pieces that remain, probably due to its remoteness.