What he's supposed to do is admit that the abuses were obviously foreseeable, and build in safeguards to prevent them. Or withdraw the system, if he can't. The

What he's supposed to do is admit that the abuses were obviously foreseeable, and build in safeguards to prevent them. Or withdraw the system, if he can't. The abusers didn't work for him, but he willingly sold his product to them, knowing that it would be used abusively. (Or being incredibly stupid, if he didn't know that.)