The big advantage is that for all the people wondering if...

The big advantage is that for all the people wondering if someone is really interested, there's finally some proof one way or another. You don't have to rely on a hunch, or continue wasting time if you're in denial, which is a common scenario, ... On the flip side, it could create a generation of actors who know that their conversations are being interpreted, and therefore are less inclined to be genuine.