Image by Butte-Silver Bow Public Library via Flickr
Bottom line: It's just business. Walking away from a bank loan secured by collateral is not unethical.
"But I own that I cannot see as plainly as others do, and I should wish to do, evidence of design and beneficence on all sides of us. There seems to me too much misery in the world. I cannot persuade myself that a beneficent and omnipotent God would have designedly created that a cat should play with mice." -- Charles Darwin, Letter to Asa Gray
Image by Butte-Silver Bow Public Library via Flickr