IDK how diff JP bars are but you'd think for safety reasons ppl would make darts not super sharp or so
It still has to firmly affix in cork, and physics has a limit. One of my old pubs didn't have particularly sharp darts, but I know one guy still got one in his temporal lobe. He was fine, but he still had to go to hospital for hours; so that's why you don't hang around downrange.
Although as a kid we had a blunt magnet dartboard, it was just bollocks.