I wish they would give (or sell!) some bigger banners - I know they have them but I can't seem to find them anywhere. Hell, you can see my roof from the interstate, I would let them hang a huge O on it - maybe even paint it (and in my younger days I would probably just do it myself)
I am going to print off a bunch of the cool old-style circular signs they put on car magnets and go vandalize some telephone poles and other wooden, staple-able structures as well. One positive aspect of living with an interstate, a railroad, and two county roads going through the place