The best businesses are the ones where everyone benefits.
Robocalling is not one of these.
Robocalling is phone spam, protected by a loophole that allows politicians to evade the do not call list. Now, some states are trying to ban it, or at least make it less efficient by requiring a human operator to ask you if you want to hear the recorded vitriol before they play it for you.
Robert E. Kaiser, who runs a company that spams millions, doesn't seem to get the whole idea of permission marketing. He's quoted in the Times as saying that he should be allowed to continue this because, "You might not think there would be a segment of the public that would want the calls, but there probably is." Fortunately for those of us in need of more negative, anonymous phone harassment by computer (even though we're on the do not call list), Robert is working late to ensure that we can
be sure we'll get our fill.
Media rule of thumb: if people wouldn't miss your ads/content/noise if it went away, you should find something else to sell to advertisers. Not because it is ethically wrong to annoy people just because you can, but because in a world with a bazillion channels, people will just ignore you if they choose to.