I hope he does try to sue for a link to google which has a link to his own site which behaves in a certain way based on the if HTTP_REFERER header says it was f

I hope he does try to sue for a link to google which has a link to his own site which behaves in a certain way based on the if HTTP_REFERER header says it was from google. He could stop the behavior at any time by changing his own code. It would set a good public precedent to help curtail such buffoonery moving forward.