It might help, but it&#x27;s a bit tricky, because there are virtual numbers (Google Voice), and banning those catches real users who use GVoice (like me). It&#x27;s a tricky balance, and my sense is that like DRM, it usually ends up hurting legitimate users more than bad ones who will just use one of their many workarounds.<p>One thing we&#x27;ve had good success with in the past, but just couldn&#x27;t afford once they raised their prices, was Sift Science. We&#x27;ve been meaning to try some of the alternatives to that.<p>Zumper also has some interesting ideas about it that they&#x27;ve used successfully in the past, that we&#x27;re planning on integrating.<p>Having the time to do this (and not focusing on dealmaking) will be really nice :-)