> Looking back it’s obviously completely absurd that the University of Cambridge would ask me to judge an economics competition
I don't think this really matters all that much. I might click the link anyway to find out what it is, or to find out why I am allegedly being considered, or even just out of general curiosity. It doesn't _stop_ the attack from working.
I think a process like with unwarranted phone calls is in order. Take the name and contact info provided but Google for the information yourself and contact the official site/email/phone number for information.
I don't think this really matters all that much. I might click the link anyway to find out what it is, or to find out why I am allegedly being considered, or even just out of general curiosity. It doesn't _stop_ the attack from working.