I was just telling DH (foreigner) that when I was a kid in the 80s it wasn't uncommon to get a crank call. A favourite round our way was this:
Them: is that Mrs Walls?
You: no, there's no Mrs Walls here
Them: well what about Mr Walls?
You: no, sorry
Them: no Mr Walls? Is there any Walls there?
You: no
Them: well what's holding up the bloody roof then ahahaha (slams phone down).
DH was killing himself laughing. Apparently this is not a thing in Switzerland (what a surprise). But when did it die out in the UK? Did the internet remove the need to troll people in person? And do you remember any others?