Plastic litter is just that - plastic litter. I understand and support restricting riders from tossing bottles and trash off in forests, into a field, on a mountainside in the middle of nowhere. Trash zones make good sense and are easy enough to use.
There was one article I found to be utterly ridiculous though - it was talking about fining riders for "throwing DANGEROUS PROJECTILES" into crowds... A water bottle has now become a dangerous projectile? Twenty years from now our respective Governments won't even allow bike racing because it's so dangerous. Imagine, a group of murderous lunatics throwing projectiles, riding objects capable of producing deadly splinters and featuring rotating knives, whizzing past at lethal speed to the helpless and vulnerable spectators. The only races will be at tracks with chain link fences separating the fans - for their safety...
I can only hope I'm being sarcastic and this doesn't come to pass. I'm not too optimistic though.