GGGP we did a race last year where we tried to get everyone kilted, it was a 28 mile trail run on the west highland way and I think we had around 35 (both lads & lassies) all wearing kilts of some sort.

I've been wearing a kilt exclusively for all my races since Sep 2010, so think thats been about 10 times now.
I enjoy watching the heavies and over here quite a lot of the highland games also incorporate track style running events, hill races and even cycling so dont see anything wrong with opening things up as I do enjoy reading about the heavy events.