Paradox, shmaradox! Screw the "I was only following orders" argument. We know about illegal orders, right? If the boss is dishonorable and you knowingly serve him (were you subject to mind control, idiot?), then you are no different than he or she is.

Once I had a client who had copied someone else's software and wanted to use it in his own business with no permission from, or payment to the developer/owner. The original developer would never know that it was happening. I sent my client a letter and said that it was wrong and that I could not be a party to it and I terminated the relationship. Lost a lot of billings, but I lived happily ever after.