Carl,
I'm not headed over anytime soon, but in lieu of this thread and the other one regarding tourists in St. Andrews... could you list a few behaviors/offences that would be considered bad form to locals, that perhaps a Yank wouldn't think twice about? In my experience, these are the worst because you don't even realize you're doing something that is putting people off per local customs.
Thanks,
At the clubs particularly: dress code. Pay strict attention to it. Always remove your golf cap indoors. Don't set your golf cap on a dining table or the bar surface. (I think cap etiquette is tough for Yanks to remember.) No athletic wear. Muirfield required coat and tie (unless they've relaxed that) for the noon meal usually included. Be prepared (though they can probably furnish something for the forgetful).
Also at the clubs, play from the tees they point you to and don't complain about it. If you are supposed to play a particular game, such as a foursome or two ball, do it all 18 holes. Play efficiently (no diddling around).
Be super polite. Be on time. You are a guest. Don't be loud (excepting for sing-alongs, I guess).
Don't ask for special food preparations unless absolutely necessary for health reasons (or you are asked how you'd prefer something), and then be quiet about it. Tipping. Read up on how they do it over there.
And, of course, never, "but that's not how we do it in America." And don't point out or compare for locals the differences between your experience in Scotland (or wherever) and America, unless you are specifically asked. Be careful about making fun of things you think are strange, but they do not. I can't give specifics. Better to always be complementary.
All this may sound pretty simple and obvious, nothing really unusual, but you might be surprised to find yourself lapsing from time to time if you are not careful. In my personal experience, most Scots are very friendly and open. For reference, my last trip, and it will be the last, was in 2012.