[CWSZ]

No association with them, but the folks at Jolly Roger Telephone Compnay (https://jollyrogertelephone.com/) have an interesting approach to the problem. It's subscription based, but their bots are more advanced than Lenny and you get the conversations emailed to you after the transfer.

If just a few percent of callers used services like this, or wasted a few minutes time of the telemarketers, mass spoofed calls wouldn't be a viable business strategy.