Cultural Appropriation?

[KyleAisteach]

I just want to thank everyone again for all the thoughtful replies. It's proving very helpful.

It's sounding to me like this:

Registering a tartan = almost certainly not appropriative.
Using your own tartan for various non-kilt products = not appropriative.
Wearing / encouraging members to wear a non-tartan kilt = probably not appropriative.
Wearing /encouraging members to wear a tartan kilt = potentially appropriative (with the standard followup conversation of where we draw the line between inappropriate cultural appropriation and normal and healthy cross-cultural influences).

What do y'all think? Could I take a (more detailed, of course) consensus like that back to the board?

(More discussion is, of course, encouraged. I'm not going to start writing anything up for several days at least.)