Good Idea Matt.  If people will do it.  There is a women who walk two Pug Dogs and never picks up thier poop.  We got tired of picking after them. So one day my husband put a sign in the front yard next to the side walk that said "Lady with the Pugs pick up your POOP"  Now she walks on the other side of the street.  NO ONE should have to pick up after any one's dog. Yell