Radio phone pranks/taps: How often do they backfire?

I’m aware that it is Sirius/XM, I listen everyday. I didn’t think that the prank calls they did were fake, that’s why I asked if those too were fake. But somehow that devolved into questioning about employees and who works for who and whatnot. Strange.

Fair point: when the pranker is the radio host, that’s totally different from when the radio host is the prankee.