I think that for most of us we wear a kilt because we enjoy the comfort of a kilt. When we wear it we wear it where ever we go. As for indoor versus outdoor pictures I wonder how much if that is relater to the even and would you normally have a camera with you. Many of the indoor pictures are at social events where a camera would not be unexpected.

I don't carry a camera when I go to Lowes but I do wear a kilt. The though of having a picture taken at Wal-Mart is not high on my list, but a picture at Irish Bar in Westminster was nice to have because of the good friends and fun I want to remember.