Day 348- Stop getting junk mail

I get a lot of junk mail and I hate it.  I saw this pin about how to stop it.  You take the envelope they send you that says 'no postage necessary if mailed in the US' and tape it to a box filled with rocks.  Send it back to them and they won't send you anything again.

Has anyone tried this?  Does it work?  Because I have a bone to pick with State Farm.  They keep sending mail to my house addressed to someone who doesn't live here. 

I am so going to try it.