How far back is too far?

[Karl R]

We don’t usually choose other items of clothing on a familial basis, rather on a liking for the fabric or the cut of the garment

So ... if you were buying a rugby jersey to wear when attending a match, would you choose one based on your favorite colors ... or would you choose one based on the colors of the team you're cheering for?

I might wear a shirt with my employer's logo on it. I wouldn't wear a shirt with a competitor's logo on it, regardless of the fabric, the cut, the color, or how well designed the logo is.

When I was a student, I wore a letter jacket in my school's colors. I wouldn't have chosen other colors, even though it would have been easy to find colors that I found more aesthetically appealing.

Clothing is used to demonstrate our affiliations. For kilts/tartans, that's frequently a familial affiliation.