What is Traditional Highland Dress?

[artificer]

Plenty of gentleman, my grandfather included, wore baseball caps during WWII. I suppose the Japanese thought the P-61 Black Widow he worked on was far more gastly than his headgear.
T.

I personally know plenty of gentlemen in law enforcement who wear the 'cap' as part of their duty uniform who would take exception to your statement.

Gentlemen, apologies if I have offended. However, I do believe you've mis-interpreted the general tack here. Both of these are examples showing the baseball style cap as part of a uniform. I'd wager that neither of the gentlemen in question wore/wear it where inappropriate.
a)It would be against regulations to wear a casual cap to a 'Class A' function.
b)I doubt the gentleman in law enforcement would wear his duty cap to a 'Policemen's Ball'.

My grandfather worked the railroads for 40+ years (after returning from the war) and frequently wore a baseball style cap in the summers, and wore whatever he could to keep himself warm in winter, HOWEVER, apart from fishing, you'd never see him in that style of cap.

A Gentleman is aware of his situation and surroundings, and dresses to best meet them. Wearing a baseball cap (which isn't part of a uniform or workwear ) indoors, at meals, etc, etc, IS inappropriate.

(Edit: what, the "baseball cap" has evoved even further? Moving onward from the "ball" cap, it is now simply called "the cap"? Just anothwer step towards acceptance as tradition, I say. But, in my ignorance and with much shuddering, I must ask: what is a Chav?)

Unfortunately, the baseball cap is quite nearly the only style of cap to be found these days. Everything else, presumably, is a hat. It may be a tradition, but only in it's proper place. Everywhere else it's a fashion no-no.

A brief summary of the term 'Chav' can be found HERE.