Working in Nottingham I used to get loads of grief off various members of staff there because I support Carlisle United.
It started off as sniggering and poking fun....then Forest got relegated and suddenly the boot was on the other foot

I was delirious after we beat them at their place....how much fun did i have the next shift!!!
"Cumbria My lord, Cumbria" was sung many many times to passing porters...
I've had the whole range having lived in a few parts of the country, Glasgow, Liverpool, Nottingham, Cheshire- it ranges from knowing respect to utter contempt....depends largely on the brain power of the person judging though I find....