Why do these f***ing telemarketers keep calling????!!!!

Do what I do. My answering machine answers all the time. The phone rings. It picks up and says "You have reached the ___ residence home of ___and ___. We are screening out unwanted solicitation calls. If you are a friend or acquaintance state your name and if we are available we will answer after we hear the name." Telemarketers never get through and it is surprising how many hangups I get.