The two things that have changed for me in the last few years on scam calls:
Don’t have a land line anymore.
I don’t ever pick up an unrecognized number on the cell phone, it’s set to go straight to voicemail and doesn’t even ring.
I figure that anyone that I want to talk to is already in my contacts and that everyone else just has to try harder or wait for me to see why they left two voicemails. 
Ya my thoughts are:
I also don’t answer unknown numbers, unless the caller ID is recognizable.
I have time to kill when driving and a very childish sense of humor. I can keep them going for ages before they realise I’m just messing with them.
I find a thick Russian accent which occasionally slips into Welsh or a similar Faux North Korean as “team America Kim jong il” is the comedy hot spot for me
Plus if I’m dicking around with them some poor old lady isn’t getting her pension pot raided. Win win.
*edit
I also attempted to put on a thick Indian accent and tried to make it look like the scammer had phoned another scammer but it didn’t work out well. But it was pretty funny for a spur or the moment attempt
I once, for a week or two worked in a call center that cold-called people about some energy scam, err product. People hardly listen, and we started playing with that.
Good evening, this Fransje Bauer (a Dutch singer) calling about your energy expenditure…
People would not react at all, so I escalated:
Good evening, this is Adolf Hitler calling about your energy expenditure…
Hilariousness ensued and I got promptly fired.
If its all the same I would of laughed my ass off if you had of called me as Hitler
When I get a call from an indian scam center I just say ‘Shouldn’t you be thinking of your karma?’ and hang up.
Oh that’s epic!! Love it. Definitely stealing that one
Not Monthy Python but with vehicles nonetheless…
It’ll buff out. Those things are built like… tanks
badabum tissssh I’ll be here all week ladies and gentlemen.
I hope those guys are ok. Tanks aren’t particularly well suited to any kind of collision.
Maybe the driver was sober that day?
