Many mail boxes in Melbourne have a little sticker on them that say "Advertising material not accepted, thank you" - which is to prevent the people who stick real estate fliers and pizza delivery menus into your mail boxes (seriously, stop doing that pizza people).
However, whenever I see one of those signs I just picture the mail box as a giant monster and when someone puts mail into it's mouth it chews once and determines whether it's advertising material or not. If it's not, it happily gobbles it down. If it is, it spits the pizza delivery menu out with a polite but firm "no thank you."
How does your imagination run wild?