Now in full work-from-home mode, having to deal with more scam callers. It's honestly easier to answer, keep working and mess with them rather than hear the phone ring incessantly. After a few rounds, I realized there are only a couple different scripts they use so it's just about mindless to string them along.
There's the "eligible for zero percent on your credit card" scam, the "you were overcharged and are owed a rebate on your utility bill" scam, and the "medicare supplement" scam (probably got on some list due to having my late father live with me until he passed away).
"Blue card" has been a perennial winner other than the one incident in the OP. Utility bill calls go pretty smoothly, a couple of short questions then I'm asked to get a copy of my bill, I "have to go upstairs". They always say "I will hold, take your maximum time" (odd phrase), then I put down the phone and let them wait.
I used to tell Utillity Bill callers I didn't have any copies of my bill, I throw them away after I pay them. But that got too involved. "Don't you have one waiting to be paid/why don't you keep them/can't you log on to your utility and get a copy"... I just want to get to the point where they are expecting me to go do something and see how long they wait.
It's been pretty entertaining to waste their time and given stay-at-home and there's nowhere to go, it's one of the few bright spots to the day to see how long a scammer will endure. Turns out Medicare Supplement scammers are pretty tolerant of nonsense; perhaps they get a lot of senile confused people. Today was a Medicare guy from India, I answered everything with "I'm not on Medicare." Probably answered 6 or 7 questions that way regardless of the question. When I sensed he was going to hang up out of frustration I said wait, I don't understand, do you want to talk to my wife? Got a relieved "yes", said hold on, she's upstairs, I'll get her. Set phone down, see how long they wait. 14 minutes!