Google App showing homes with guns gets smashed with negative reviews

This App (available here) makes as much sense as when the New York Journal News published the names of gun owners in Westchester and Rockland counties.  The primary effect of this makes those who don't have guns an easier target for criminals.  It is a safety issue.  The simplest way of putting this is asking whether the makers of this App would be willing to mark their homes as gun-free zones.  I have done a lot of debates with gun control advocates over the years and I have never met someone who has been willing to put up a sign in front of their home indicating that their home is a gun-free zone.