This photo was from the Minnesota Vikings @ Detroit Lions but it doesn't say the year. Favre played with Minnesota for the 2009 and 2010 season. In 2009 when the Vikings visited Detroit, the Vikes killed the Lions, 27-13. So the "old man" sign really looks like a douche bag move, douche bag.
In 2010, the Vikes visited Detroit near the end of the season when Favre was hurt and not playing. I'll give this fan the benefit of the doubt that he knew better to not hold this sign up when Favre wasn't even in the game. Therefore, I'm assuming this was the 2009 meeting when the Vikings and the "old man" kicked Detroit's ass.
This is why I never make public predictions on games. Or hold up moronic signs. Someone tell me who this guy is.