What I realised is that the bigger threat is creating a honeypot of Bitcoiners identifiable through their partners, who went through ID verification in the past. You couldn't trust that that data would be deleted.

Of course that would be somewhat obfuscated by the fact that you couldn't conclusively map the chat on the app with a person they met in the real world and married 3 years later.

I agree, first of all the ID verification, but I agree that people might be willing to present their ID in order to obtain compromising information that can be used in such a manner than is not traceable back to them.

In one respect my response is caveat emptor. Life, including love, is risky. And I don't think it's in the spirit of Bitcoin to protect other people from themselves.

Typically security like this, from serpentine behaviour, comes from networks where repeated interactions around shared activities allows participants to identify habitually good actors or trustworthy actors. This is extremely difficult to achieve in the context of a dating app, where dating is explicitly the goal as opposed to something that happens as an outcome of another goal that is more efficient at identifying good actors.

So in the absence of a good game that users can play, as a proxy for identifying honest actors, the app could identify patterns of behaviour that are often associated with cat fishing and pig butchering, and then warn stackers incessantly.