I think the reason they dont take phonecalls anymore is the simple fact that most of them were stupid as all hell. The typical call was like this:
BR: Hello, you're on the air
Caller: Hi Bob, I love your show and you have great hair
BR: Thanks, whats your question?
Caller: Umm, yea, nice hair, and, what um, do you think about Manny, is he good or not?
BR: Manny is the best hitter on the team
Caller: But what about is OTS
BR: His what?
Caller: Damon too
BR: Allll right, thanks for the call!
I cant stand listening to people who have no idea what they're talking about try to argue baseball. It annoys me.