I was at a match in Germany the week before last. My buddy and I got a bite to eat at one of the several kiosks on the path to the ground. It's very much an eat while you walk situation.
It became obvious that we couldn't bring the freshly purchased bottles of Coca-Cola beyond the turnstiles so we had to slug back what we could. I noticed that there were big wheelie bins by the gates but then I looked around at the bollards outside the ground and there were Lidl/Aldi bags for life tied to them - the owners of which were clearly down on their luck people, sitting on the hard ground in -9°C weather, who were encouraging match punters to lob their bottles/cans into the bags.
Every once in a while, one of these people would venture to one of the official stadium bins and try to open it or knock it over only to be shooed away like a pigeon from a picnic.
Later in another part of the city there were homeless people loudly arguing over bottles and cans.
It won't be long before we have these scenes here. Fellas stabbing each other over MiWadi bottles down the Pairc whilst Westlife mime their hits inside.
I saw the same in Stockholm a while back - albeit, in that case, a well-dressed pensioner doing it because it gave him exercise and augmented his monthly stipend.