In Australia we'll have a little no junk mail or no unsolicited mail sign and most box stuffers are good at following that even though there's no legal obligation - except real-estate agents. They suck.

I saw one as I was leaving one day who had just left a typical pamphlet in our mailbox. I pointed out the no junk unsolicited sign and he started on how it was important information I may be interested in.

I suggested that while that was a nice rationalisation, he knows it's bullshit and he should get his hand off it.