Is it wrong

Is it just me, or is it wrong for football scarves to display the colours of the two teams that are playing each other?
And the shop in the town of the home team selling strips of the opposition.
Fraserburgh, the Highland League Team, playing The Rangers, SPFL team, I. The Scottish Cup on Sunday.
It's a big game for the new, (only 5 years old) little team.
But also for Fraserburgh.