I see a couple of problems with the arguments here. First on the gender-rights issue it might or might not work the same in Germany as it would in the US or the UK, but even US and UK laws would allow a business to set a standard of dress that did not cause a distraction for both men and women. I am sure the company would argue it that way if it came to it.

Second is the cultural argument and Douglas you stated:

Quote Originally Posted by Douglas Bryant View Post
...I have seen members of the royal family wearing them, it's isn't uncommon at weddings.

I wear simple plain utilikilts, in beige or brown to work, with a jumper or TShirt, I don't swagger or boast, or make a big deal out it. It's just my clothing.
My guess is you haven't seen the royal family in utilikilts and they would not be considered cutural dress in Scotland for weddings either. Push comes to shove many of the garments called kilts (and the way they are worn) would probably not pass as cultural dress. No offence meant to anyone.