ok, for one, if you change the thread you started then my post makes no sense at all really. That's not very unusual actually, but to get on to my second point, Coast to Coast AM does screen there calls and it's pretty rare when they don't. You may have something with the Friday part of it because they have something called open lines where they may or may not screen anything.
Third, I like Coast to Coast a lot, they talk about many different things, some cool and some lame. That being said, I would never turn down a chance to prank them but it's just been tried so many times without much success.
Good luck getting through to the show on any day or night since they have one of the biggest markets of any station. There lines are always jammed and if you listen to the show you will hear people saying "oh wow, I can't believe I got through...I've been trying to get on for years.".
Record your shit if you try this and good luck!