I suppose you can use them in a scrap if you are so inclined. My sister had her Gucci belt confiscated at the Stadio Olympico in Rome, absolutely no chance of getting it back again!
Unfortunately while you have morons in the crowd prepared to throw stuff, the bottle top ban will be just the start.
In Italy they also confiscate belts, and then it’s not a stretch to see them confiscating coins (already we have a cashless ground so why bring coins?), mobiles (could easily...