Funny. I&#x27;ve handled a lot of dialer traffic for customers, as an intermediary (a billion calls every day or two).<p>&quot;Legal&quot; robo dialer is fairly easy to block. We blocked it on our systems using the same ideas as in the link. Look for repeated calls, low call duration, etc. However, <i>this did not impact our calling stats at all</i>.<p>That&#x27;s right, even filtering out all the &quot;known&quot; dialer, we still had tons of shitty dialer traffic coming. The scammier the dialer, the more inclined they are to just make up a new caller ID for each call. Then there&#x27;s no real pattern and it&#x27;s easy to slip through. This is illegal and the FCC can fine $10K a day or something. But they don&#x27;t.<p>That&#x27;s the REAL problem. There&#x27;s never any follow up. Sure, end-users complain now and then. What does that do? It makes one telco pass up a request &quot;please review or block this number&quot;. That&#x27;s it. It is utterly ineffective.<p>If the FCC was actually serious, they&#x27;d start enforcing rules and hold companies accountable. If I, as a VoIP provider, am liable for my customers to a certain extent, then I&#x27;m gonna be a bit more selective. I&#x27;ll make sure my $29 customers aren&#x27;t faking caller ID or sending lots of calls. On the wholesale side, I will make sure my contracts contain harsh penalties and keep customers liable. It&#x27;ll take a few months for stuff to trickle down and be enforceable, but eventually the FCC can simply start handing out fines and this whole game will be over.<p>There&#x27;s nothing really stopping this from happening other than the FCC not wanting to do it. Sometimes people say &quot;oh well the problem is someone in Elbonia can sign up for $15 and get going&quot; - yeah well eventually their calls hit the US network, and US law applies. If the provider is letting the Elbonians do their scam, the provider is liable. End of story. Suddenly, providers will require a deposit and scammers will piss off.<p>It doesn&#x27;t even have to be a large fine. Just making the cost of making up a new identity be non-trivial (a few hundred dollars is probably enough) will put a pin in it.