I remember reading, in one of Orwell’s books I think, about how buskers make more money if they maintain a small number of coins in the hat on the ground.
This seems to cue people to follow suit and make a donation (online donation buttons might therefore be equipped with a numerical feed from the target paypal account, indicating how much had been given by the last donor).
Today’s invention takes this to a new level by creating public waste bins which have some prominent items of rubbish manufactured into them and rendered highly visible through the basket mesh.
I’d suggest luminescent orange Lucozade bottles and Subway sandwich wrappers since these are a) prominent and b) everywhere underfoot.
