I've had a fantastic debate about operating systems with one.
"You have a virus in your windows computer"
No I use Linux (or Ubuntu)
"No, thats the manufacturer", "look near your space bar, you have a windows key, see... you use Windows"
... errr
"tell me sir, what do you see when you start your computer, a multi-coloured flag correct?"
no a penguin
"sir, you don't really see a penguin".
yes I do
"no, you don't"
yes
etc.
What I don't understand is, what is their end goal? Are they trying to sell me virus protection? Surely once you've openly started bickering with someone all hope of selling anything is out of the quesiton.
Maybe I'll try Android next, they'll at least have heard of that