Ive always been of the opinion that nothing is vandal proof
same here. if you build it, they'll always find a way to destroy it.
Granted, it takes quite a bit of effort to snap-off one of the braille dots, but I'd imagine about the same to pluck a glass bead out of a hole.
there are after-market braille-dot rounders available, but we simply adjust our exposure settings to create the domed-effect.
(imho, the regulation of rounding the dots because it "desensitizes fingertips" is marketing b.s. on rasterbraille's-behalf. by the time you paint the panel, the "standard" cylindrical-dots will have a soft-edge anyways.)
the lettering, however, is absolutely impossible to remove without completely destroying the panel itself. whereas the rasterbraille lettering is only as strong as the double-sided tape that comes with the material... which I have removed fairly easily from signs, out of curiousity/mischief.
if you DO go the photopolymer-route, I'd highly recommend getting a laser printer to print your exposures... as weeding braille-dots becomes extremely tiresome on large projects.
also, the foil stamping machine is a blessing.... masking&painting letters was a pain in my _ _ _ for nearly a decade before we recently incorporated it into our process, and looks WAY cleaner in the final product.
