I used to be into knives and carry them in grade school a million years ago. Nobody cared back then -- very innocent days -- until you throw them into the ground on the playground after school. Then it turned out the principal cared

(even then, it was a mild discussion -- nobody thought of anybody doing anything crazy with a knife back then). Among others, I had a Buck (I guess it was the 110 looking at the pictures) -- I remember polishing the brass with "Brasso" as it would tarnish pretty quickly.
My dad used to always carry a Christy sliding knife on his keychain.