Stealth Anti-Bush Campaign?

I just saw a few of these kinds of displays in my neighborhood. At first, I just assumed it was just someone getting rid of an old sign. Then I noticed it was for '04, it was placed upside down, and it was precisely placed to be maximally visible to passing cars.

Anyone else out there seeing this kind of display? Is this a coincidence, or is it a stealth advertising campaign against the Bush-Cheney ticket?