They are the worst of the bunch.

When we first moved here the phone company gave us the phone number of a deadbeat who moved away. Call after call asking for this clown nearly drove me to distraction. I told them time after time there was no so and so here. Either they didn't hear or didn't care they kept calling until the last time when, out of sheer desperation I shouted, "Call Hell, he went crazy and I shot him."

No more calls.