The article mentions Tindler Swindler, and I can vouch - it's a great film. It is an absolute puzzle at first, cause the man spares no money to trigger a Cinderella in the victims: real charter jet, real high-class hotel, real flowers and gifts. And she has 0 at her bank account - what the man that can burn more money in a day that she makes in a year may potentially want from a poor girl, financially? Then the puzzle is solved (but I will not spoil here).
The film moves slowly and shows how the girls were hooked. And you can clearly see that they have no defense. Absolutely no defense, except to kill Cinderella inside herself, and before the fact at that.
But is it possible or correct to tell a girl "You should never date higher than your own status (whatever it is)"?