I find it hard not to put some blame on the victim though. At the end of the day you are are responsible for watching out for yourself. When I look at the pictures of these people scammed. They are most often unattractive and unaccomplished people that believe suddenly a good looking international fashion model or a Harvard Doctor is inexplicably interested in them.
I know its kinda sad but you have to have SOME idea of where you fall in the game of life and if something that much of an outlier comes along. You have got to be a little suspicious that they would really be interested in a romantic relationship with you.
You cannot protect someone that has allowed this level of delusion to be their real world view is my point. "Protecting" these people from themselves essentially requires complete submission and removal of free will from at least some part of the population by force.
I've watched the documentaries and most of the people after the fact admit that they basically did it to themselves. Nothing anyone could have done would have changed the outcome because they wanted it that way until it was too late.