Just took the time to look at the linked article. They're concentrating on plastic glitter, which is almost a 'microplastic' by definition, and quite harmful stuff. For what we do plastic glitter is useless. It's too low in density to settle well on a surface, and the static cling issue means that it doesn't form clear patterns. What we use is aluminum glitter. It has it's own drawbacks, of course, but it's not the stuff they're talking about.
My violin making teacher did run into one hazard with it, though. She was on a tour to England many years ago to demonstrate her methods, and brought some glitter with her. Working with maple and spruce she used black glitter. She got held up in customs at Heathrow for several hours because they suspected it was gun powder, and she an IRA terrorist. Although her maiden name was 'Malley', she was in her seventies at the time, and hardly fit the profile. Nobody thought to try putting a pinch in an ash tray and lighting it to see what would happen.