Yes them crows can be annoying the buggers were in my back yard only a few months ago, shot a couple but two got away with a semi full of bits.
I think the real danger now lies in the Chinese and their thirst for steel. Local TV adds here late at night are offering farmers cash on the spot for old trucks, tractors and cars.
This is going to really hurt the collector looking for spares as farmers who are cashed strapped because of the drought are just selling their mess up.
If you are a collector in my area of Australia you can watch the trucks comming into twon every day now.