Luckily, I don't have any incriminating evidence, but a few times, I wore denim shirts that weren't tucked in over a t-shirt with my Lennox tartan kilt. Also wore a skinny belt in my early weeks of kilting... That's about it for me.

I have recently switched from a Scottish shop style kilt belt with the silver buckle to a wide handmade leather belt made for Utilikilts. Has a normal buckle which looks less garish than the previous belt. Works nicely with a traditional kilt, too. I've also stopped using the Russian surplus belt that I used to wear with my UK's. In fact, I may be posting that one in the for sale forum.

-J