The weaknesses of the phone system are being exploited and exposed. Telemarketers have learned they can just put whatever they want on their caller ID with zero verification, including the phone numbers of random local individuals. If the FCC and/or the phone companies don't start forwarding originator information so spammers can effectively be blocked by any user, the phone system will (and deserves to) fail. At least among my friend group, most of us don't have each other's numbers, we communicate on chat apps.