Conversely...

Early 70s, a mate of mine was in London, it was cold, so he was wearing his blue and white scarf around his neck, when some Arsenal fans spotted him, and shouted "Chelsea - get him!" and chased him.
Not knowing the area, he got cornered.

He turned to face them, alone against 6 or 7 gooners, and said something like
"Look, if I'm going to get a kicking, I'm not going without a fight.
And I want it to be for the right reason - I'm Cardiff, not fooking Chelsea!|"

With that, they started laughing and had a bit of banter, then they showed him the way he needed to go.