I actually met some of the people building these types of company, they completely blank when you bring up ethical concerns and unintended consequences. I'd love a townhall event with one of them just so the world could see the type of men behind these dating apps.
To be fair, a lot of professional programmers (regardless of application / industry) completely blank when you bring up ethical concerns of their work. As long as they're being paid and it's an [interesting | challenging | hot] technology, they're more than happy to turn a blind eye toward the application they're actually building. "Hey, I'm just moving protobufs around, it's not my fault my company uses it to build the Torment Nexus!"
