I don't fault the tattoo artist, as long as they are simply doing what someone gave them. And there's a level of caveat emptor in getting a tattoo without making sure you know what it REALLY means -- whether it's kanji or simply some sort of symbol.Fortunately my employee doesn’t really need the brail. He knows where he’s going. But I agree that it’s kind of crappy. It’s analogous to tattoo artists doing kanji that’s mistranslated.
But the sign maker who put bogus braille on the signs? Nope -- that's all on him. That's a detail that's potentially life and death.