Oohh, I quite like this. I'll have to buy one
so I can wear it to our next Accessibility Issues Committee meeting (so as to have something interesting to talk about, as opposed to it being the usual yawn-fest it turns out to be) - having more braille around the library could only be a good thing.
Although, given the high quota of dodgy geezers that frequent the library, I suspect actually wearing it while on duty would be just asking for trouble.
Ideally, in fact, there'd be one that just read 'Asking for Trouble'.