One of the positive outcomes of my unfortunate incident with a taxi driver was an introduction to Christopher Gadenne.
He’s a former Parisian police investigator who now dedicates all his free time to helping others. In particular, he’s launched the Safety Scouts YouTube channel to increase victim awareness of common attacks or scams.
Here are some of the videos which apply to the most prevalent tourist scams in Paris. (i.e. the fake “deaf person” petition, the bracelet scam at the bottom of the steps to the Sacre-Coeur and the people who “help” you at the Gare du Nord ticket machines.)
Each of the videos is less than a minute long and they are most definitely worth watching.