'No Junk Mail' Junk Mail

I have an idea for some kind of marketing campaign. It is probably most appropriate for an organisation that is about reducing waste or living with less, but I have no idea who.

My idea is to deliver people some junk mail that has a 'no junk mail please' sticker in it. 

I think there are probably a bunch of people that do not want junk mail, and would put the sticker straight onto their letter box as soon as they received it.

This would have the impact of creating a dramatic decrease in paper consumption, as well as freeing people from the distraction of needless advertising. And of course it would help promote the cause of whatever organisation was behind it.

I am laying no claims to this idea. It has probably already been done somewhere. Who could pick this up for Melbourne?