As discussed before Magpie .. not going to make one iota of difference, just like extra tax on cigarettes doesn't. Heavier fines for dropping maybe, but gotta' catch the litter lout first.
Only one way .. complete ban as in Singapore, which was mainly brought in because chewers were discarding on the door frames of their Metro, and affecting the working.
Like a chew meself, but wouldn't dream of dropping on the floor .. dirty b*ggers !! Feel it has become some sort of cult or fashion to do this
