"my precious child a common cheater? Never, we raised her well, it must be your fault!"

Clearly I've been living abroad too long. I had completely forgotten about this aspect of the American psyche.

You're right. No amount of having done something wrong will ever be enough to make something an American's fault. I remember golfing with a guy and hooking a ball into somebody's yard, saying something along the lines of "glad I didn't break that window." He then went on to explain his view that the golf course should pay for things like that, since it would clearly not be his fault if he hit a ball through somebody's window.

Expel that guy's kid, and I can see what you mean. Good luck fighting the good fight!