You can't always control what people do with accurate information.
It's true that granny's Social Security check hits the mailbox on a certain date. Given that information, there are some who will steal the contents of the mailbox on that date. I suppose the post office is to blame, the SS administration, anyone except the criminal themselves, right?
Of course this post is my opinion. Every post by anyone is an opinion. I'm not writing a white paper on scams… in this post, anyway...