1.   Callers are screened to weed out the extreme nuts and also provide a politically and geographically attractive mix.

2.   Like Elvis, he even has a controlling mother who screens his callers and tells him what to charge.

3.   Of course, a producer will screen callers to maintain some sense of sanity, but it will be real people providing real thoughts for the audience.

4.   I wished the TV station had screened the callers more carefully.