Wow, very persistant! For a good cause, though! I hate unaddressed mail. Here in the Netherlands, you can just request a sticker from government to put on your mailbox, saying you don't want commercial leaflets, unaddressed newspaper, or neither. It was one of the first things I got when I moved in.
What a waste of trees and money!
Yes, I think that many places now allow the sticker! Thanks so much for coming I appreciate it!