I actually enjoy telemarketers. Especially loan officers. Here's a good trick we use all the time..

When one calls about refinancing we tell them "I am really glad you called, we have a bunch of equity and need to refinance. You know what I gotta go grab my loan info in the other room, can you hold on for a minute?"

Then we put it on speaker and wait to see how long they stay on. I seriously had a guy wait for an hour once. It's a great time, cause you can practically hear them drooling and they will wait forever.... I have never had anyone wait less than 10 minutes.