Whoo-wee, we met all SORTS of people at Wurstfest who were absolutely incensed about that proposed container ban. From the hotel clerks to the bus drivers, they were all against that ban.
From what I've read, though, the ban has passed. From what I was told, tourism will be badly hurt because of it -- although (in my cynical way of looking at things) I would expect that the tourists will still come, but they will now drink hard liquor out of hip flasks (instead of beer out of beer cans), thus making for a bunch of rip-roaring drunks in inner tubes, rather than a bunch of mildly buzzed people in inner tubes.
There might be less litter, though.