It's sort of like the folks who came from honest Scottish farmers (as I did, mostly) having to invent themselves some made-up tartan pattern and kinship with Bonnie Prince Charlie (who was actually half Polish, one quarter Italian, and the rest mostly French and Danish). It's usually harmless, but in the case of some of these activists I think it's crossed the line.
SHHHHH!
Are ye trying tae wreck ta Scottish tartan industry? Don't gae aroun letting oon thet thar ware nae "Tartan Police" in ta Highlands 300 years uhgo, and tha' women spun and wove tartans tae whutevuh patturn they pleased, and did nae jes mindlessly reproduce soom patturn laid down by uh clan chief? Do ye knoo how many wee bairns will wind oop starving, with thar pare parents on ta dole, iffen ye let Uhmereicans knoo that ta custum of distinct tartans fer everuh clan was envented by Victorian mill owners tae increese thar sales?
/Willie the Groundskeeper voice