Let's face it, there is no denying that scammers are annoying, they are everywhere, they will use every tool to try and scam the innocent. What worst then their annoying messages and calls? Them getting away with it, but not always. There is something that can be done, and this guy did that. He wasted his time, annoyed him so much to the point that the scammer told him to stop. I say karma was served.