Over 50 million U.S. consumers are already on the FTC "do not call list." Telemarketing firms that call such numbers may be fined up to $11,000 per call. Once the various appeals are decided, you may wish to hire an attorney, or sue in small claims court for up to $3,000 (in Ohio) if a firm has violated your request.
People may register their telephone numbers on the National Do Not Call Registry at www.donotcall.gov or by calling toll-free (888) 382-1222.
You can and should tell companies to put your number on the "do not call list." They are required to comply, particularly if they are a member of the Direct Marketing Association.