I Didn't mind first 3 phone calls and the email, but this time I asked the caller to put us on the do not call list.   Caller wanted to know why.  I explained why.  Then the caller told me he could not put me on their do not call list,  I had to do that myself. Note: The phone number he called is already listed on the National Do Not Call Registry and has been since December of 2004.  I told him I didn't want to argue about it and not to call again.