Thanks for the suggestions. I like the safety pin idea, and I may experiment with that- it's a "mod" that I could apply to a lot of pants with little hassle. I think I'm also going to experiement with the "flat pocket insert" idea that I posted elsewhere.

Don't notice anyone wearing boots in my workplaces lately.

Not sure about the garters- never worn them, but aren't they designed for taller socks than those that usally accompany casual wear.

Not sure if I'd be more embarrassed to have the knife seen or the garters... :-)