Ethics and courtesies of branching into other tartans?

[ThistleDown]

Steve's post is excellent! In keeping with his format, I wear:

Davidson, because that is my surname (I have three different colourways);
Davidson of Tulloch, because that is the family from whom I descend;
Clan Chattan, because the tartan was woven by the late Jamie Scarlett and gifted to me by the late Mackintosh (and I have been a sitting member for the Clan Chattan association for over forty years);
Mackintosh, because that is the family of Moy, my cousins and on whose old estate I have a home;
Lochaber, because that was where I formerly had a home;
Maple Leaf (the Canadian National tartan) because I live more than half each year now in British Columbia;
Two Freedom kilts, because they are comfortable;
a Utilikilt, because it performs well for me in the garden. One of my Freedom kilts is rapidly moving in that direction