When we get called from a number we don't know we used to simply reject the call. Now, as of this week, we are publishing the metadata to a kafka topic so that we might be able to do some post-processing on these events which might help identify these robot callers earlier. We've already learned that the volume of robo-calls decreases dramatically on the weekends.
The hope is that we'd at the very least learn something about how they operate but at the very best possibly provide an api that allowed people to check if a number was currently considered a robo-caller or if their city, state, zip was currently under attack. That way, for example, the makers of robo-killer, etc... could provide better protection. Perhaps we could even create a live map of the attacks.
I'll follow up when we do and post something to HN.