we need some out of the box thinking for this..........in western countries people are conscious enough to understand that this is public property..........but in INDIA where we have educated illiterates ........fines and advertisements are of no use......nobody pays much attention to them..........rather something innovative like a cleanlines SQUAD, and also a unique punishment would be PUBLIC HUMILIATION.........no fines no jail term........just point out the mistake publicly and then make them realise their folly.......i am sure people will think twice before littering the PF