The fact that our elderly neighbor constantly - like every day - hassles us about the state of our front lawn. We didn't water it enough for a while so a patch at one edge, maybe five feet long by a foot wide, is dried up and yellow. I guess she finds it embarrassing to live next to such squalor.
And yet her back yard is literally one continuous six-foot high pile of junk covered in tarps, hoarder-style, which we get to stare at every time we want to relax outside or have friends over for a barbeque.