Once again, caller ID to the rescue. If I don't know the number I let it go to voice mail. If the call is legitimate the person will leave a message. Most of these telemarketers (a.k.a. scammers) do not.
How many times have these [***] called me? Too many. We need tougher criminal laws for telemarketing. How about 10 to 20 years for unauthorized unwanted calls??