"Neil Williams" wrote in news:1158058651.396263.199770
@b28g2000cwb.googlegroups.com:

I don't think that's a problem, indeed it's probably a good thing on
environmental and waste terms to prevent people throwing the things on
the floor. Singapore even charges a deposit on its single tickets,
which are issued on an Oyster-like card.
SNIP

Yeah but in Singapore they're completely nuts - where only until recently
were you allowed to chew gum just in case you happened to throw the gum on
the floor recently!

I wouldn't use any Singapore regulation as any kind of benchmark!