I trained last year to be a track official, although never ended up doing it because schedule for the real job changed and I couldn't adjust to do it. You would be surprised at all the crazy rules that there are for high school track regarding jewelry, clothing, etc. Rule of thumb though for the official involved is to kindly ask the athlete to remove the jewelry. Now I am not defending what the coach in question did by any means because I wouldn't/couldn't have done what he did, but the girl should have known better.