This "Ford Field is a tough place for visiting teams" is a cute idea and all, but it didn't seem to stop the Chargers from whipping the Lions in Detroit last December, did it?
So before we continue with the "nyah nyah, Texans lost to SD" stuff, let's remember that the Lions laid an egg at home against the Chargers too, late last season. Back then, there was NO DOUBT that SD was horrible. Heck, I think they even coughed up the ball more than Detroit, and the Lions STILL lost. Anything can happen.