Go Away Telemarketers

Do you ever get tired of all the telemarketing calls?? My wife is a stay at home mom, and each night when i get home from work, she tells me that the phone simply rings off the hook. Yesterday she actually showed me all the calls her cell phone even received.....10 calls that were from telemarketers. She has stopped answering them because she doesn't have the time. It's frustrating because all of our numbers are on DO NOT CALL Lists, but they still call. Does anyone else have this problem?