Keep in mind however that the only ones who can "listen in" on your calls are your ISP, our ISP, and the phone companies on the way. None of which are going to bother filtering through millions of minutes of call time.
That's not accurate. Cable customers can listen in to unencrypted VOIP calls within the same node they're in which means their neighborhood.
Does that mean all Cable calls are unencrypted by default? How would a customer turn on encryption? -- Fight NebuAD and the like: Click Here to pollute their data