u/Voldemort

Ahh I wasn't really thinking of the injury implications. In terms of after war cleanup and decades on effects to civilians I didn't think it was a problem. At least clean up efforts would be simple enough with just a good pair of gloves and side cutters.

I've stabbed myself with fibre optic and I do agree, it's not nice, a lot better than unexploded ordanance though so I didn't think of the injury implications.

Fibre glass is essentially silica fibres with a trace amount of metal to make the fibre glass act the way it does. Guess what sand is also made of, silica with trace amounts of impurities. So when they break down it'll just be sand in the end. Not 'decomposable' but quite friendly to the environment still.