I'm wearing a sports top today to indicate support for a match later today.
Was at the supermarket today and this man, clocked my shirt rolled his eyes and riffed off the Name Three Songs comment and said "I bet you can't name 3 players". So I asked him if he was at the stadium (200 miles away) for momentous match a fortnight ago when X Y and Z scored?
He had the grace to look a bit abashed.
Why do some folk assume you are not fans when you wear band/location/ten shirts? Is it just to show off their superior knowledge?