I get a lot of junk mail so what I do is save it all,when i have a lot i put it in an evelope and send it back to a sender at random stating.
Congratulations you have been chosen to recieve absolutly free my months supply of junk mail, if you want to be included in nexts months draw please send more mail.If not remove my name from your list, You do not put a stamp on the envelope making them pay.In the UK it is double postage. That stops them.