I'll wade in again and say that as far as "scottish-ness" is concerned, and my relationship to it, I'm most comfortable with the basic principles proposed by New World Celts . To me they encapsulate the issue well.

One of their aims is:
To perpetuate Celtic Culture and history in the New World.

So I see myself as a person with distant celtic origins, now in the new world (Australia in my case), happy here but with a desire to promote and perpetuate celticism through music, celebration, and wearing the kilt.

If folk in Scotland, or anywhere else, don't want to celebrate their heritage, or want to get all exclusive about it, that's their problem.
I won't let it affect my life experience.
Graham -kilt wearing isnt frowned upon in Scotland, honestly.
I did say "often frowned upon", that doesn't mean always and everywhere.
Reactions can be greatly varied, from just being seen as a tourist as Ranald says, to looks of disdain and just being ignored.

Wearing a kilt in a pipe band is of course very accepted, but casual wear, I think much less so.
Really, it's no different here in Australia, and I would guess anywhere else. Attitudes are the same.

and yes, I do know that most famous scots have never probably worn a kilt and wearing a kilt doesn't make you a scot. I would have thought that level of maturity is accepted of those who post on this forum.

The "dissappointment" I expressed is that one would hope that Scotland would be the place where the kilt is more widely accepted in every circumstance than anywhere else.
Sure there are places where that is the case (perhaps Edinburgh for example), but overall...maybe not.

I had no illusions shattered in Scotland, I did my research here and elsewhere and pretty much knew what to expect.

An illustration: you travel to Skye, you know it rains a lot there in summer, you expect it, but it doesn't stop you being dissappointed when it rains the whole time you are there!!
So it is with kiltwearing there.
Beyond all this unnecessarily wordy discussion... I love Scotland, especially the landscape and historical buildings, the churches and cathedrals, and Iona above all.
I can't wait to go back and spend more time there.