While it's unfortunate that we have to advertise which homes have guns, it supposedly serves as a notice to your neighbors or other persons who can dispute the fact that you should be allowed to carry a concealed deadly weapon. Assuming, of course, that you didnt get them to fill out your 5 letters! It is the responsibility of the applicant to file and pay for the ad, the pro's office simply makes sure you did that.
Not a lot in the DE process does make sense, but... I see no way around it at this point in time.
Moosie