I've had to stop wearing kilt pins (except one) because I keep loosing them at my house (yeah they're on all day and when I take my kilt off the pin dissapears!). The one I still have is a diper saftypin type thing that a woman at a the KC Renfest pined on me because I wasn't wearing one at the time (of course I was trying to be more 16th century and I figured they didn't have kilt pins at the time).

Funny little story about that pin: The woman asked if she could pin it on me and I said to ask my wife and she appologised for not noticeing I was married. In the end my wife gave permission and she got to pin it on me. The woman seemed pretty excited about doing so!