On-air callers

Hi there. I'm doing research for a blog post...Does your station have a phone-in show and if so, what system do you use to screen and stack calls?

Or do you just answer the phone and put the caller to air without checking? And if so, do you have a delay system to dump obscene callers?

The blog post is aimed at the lower end of the market, so no need to suggest pro systems.

I'd appreciate your ideas and insights. Many thanks.

I asked around and Call In Studio is worth looking at: www.callinstudio.com