
Just put them on speaker phone and let them access an isolated virtual machine which would do 'weird' things (Eg cmd.exe would randomly open other apps (notepad / wordpad / solitaire)
I always had the VM looking 'live' with documents open n stuff and they were always closed down and clicked 'don't save changes'.
Best I did was 1:30 hours with one of them - wish I had recorded some of the funnier sessions.
( , Thu 4 Dec 2014, 19:08, Reply)

I would think it more profitable to have tourist tours around call centres during which you could stab in the spine all the people who make unsolicited calls to your house.
( , Thu 4 Dec 2014, 19:14, Reply)

I like the stabby idea
( , Thu 4 Dec 2014, 19:23, Reply)