I'm guessing the callerid is spoofed, so please don't go after that 65+ yo dude who is likely innocent. Obviously, it is easy to change callerid as telemarketers do it all the time. This can be fixed- the phone networks should only accept callerid from trusted sources. Apparently, companies can set callerid on their phone equipment. So that the general phone number is shown for outgoing calls. The phone company network just took the customer's word for it. Has worked fine for many decades.
Now, with the rise of scummy telemarketers, that system has to change. Gotta tighten up callerid. Also, make it a felony to maliciously fake a callerid.