Where not to wear a sgian dubh

[Barry]

..... though folders with pocket clips were as common as ball caps with agricultural logos on them...

This had me puzzled for quite a while until I remembered the US penchant for using the adjective without the corresponding noun. So I believe this is "folding knives" Yes?

Incidentally, when I was a young lad in the 60s I always carried a penknife (small folding knife) including taking it to school. We used them for sharpening our pencils amongst other things, and no-one thought anything of it. How times change.

As to the Skian Dubh, I have heard that even the decorative plastic ones with no blade have caused concern and confiscation