Great story as well as an important PSA. And very well told, so I wasn't surprised at the Dillard allusion in your tag.

Sociopaths like this thrive in the Tinder culture, which reduces every body to a sexual opportunity and rewards the best impression managers. We need an app--better yet, a culture--that helps people meet potential friends and encourages them to get to know each other in the real world before deciding whether dating is a good idea.