We used to call those that we knew were home but acted as if they weren't---WADs! (Won't Answer Door)
How many times have we knocked (heard a tv or radio playing or little kids making noise) and get down the sidewalk a few steps---turn around---and see the drapes wiggling!!!
I was a smart-ass when I was in the mood (and depending on who I was "working" with)----I'd turn around and give them a big, friendly WAVE, along with an even bigger smile! My bad!
Annie