I think the problem comes with the posession part of the law. I think you can clean out my truck three times and there still will be a couple of loose 22's and a 12ga with a 1 1/8 oz of 7.5's in it somewhere.
The only question I have about the condors and the lead is if it's a bullet that has been left in the critter then why are the Eagles, Hawks, and Owls not also getting lead poisoning? If you see a gut pile in the area there is one of the four birds on either the small game/ varmints, dove parts, or a gut pile from a deer or hog. Not to mention hawks swooping down and taking wounded quail before you can get there. Then lets add all the small preditors (Coyote, Fox, Weasles, and Cats) that eat carrion as well and there should be lead poisoned animals everywhere.
Now I understand the reasoning behind the ban on lead for Ducks. The 6-2 shot size are what ducks and geese use as gravel in their craw and will pick up shot and use it to grind up their food. I also have not seen too many critters killed with a rifle that the bullet is still in the critter. Granted it happens and I have about four projectiles from big game animals I have shot but they were all recovered from either bone or mussle. Not from the guts, lungs, or Heart.
I don't mind playing by the rules or spending three times as much for shells to hunt but there should be a real reason with data backing up their claim that it's bullets left in gut piles that are giving the Condors lead poisoning.