You want to be behind so you can skip the commercials!
And you typically don't want to be caught watching a game that has already been decided.
Oh no, the horror! Wait, what? I think most people don't want to know the final score till they've seen the game, but I've never met anyone who "didn't want to be caught" watching a completed game. What kind of bizarre personal insecurities cause that? Watching the game on delay has been popular since the VCR appeared, never mind the DVR. (And with the VCR, you had to wait till the game finished before you could start watching.)