Do you have an answering machine? I put mine to good use to screen calls. I also have caller ID so that if I don't wish to speak to the caller, I don't answer the phone.
Try it. You'll like it. Make them talk to you/her on your terms.
Seize the day, and put the least possible trust in tomorrow. - Horace
I have learned to live each day as it comes and not to borrow trouble by dreading tomorrow. - Dorothy Dix