Everyone hates your sign.
TV cameras and Jumbotrons nationwide encourage this kind of look-at-me display, but rarely is a homemade sign clever, or funny, or anything other than disrupted view for the people behind it. If you're in college, it's just a giant head because that's not played out or anything. If you're a parent with a young child, it's a proclamation of your seed's first game. Great. Now, instead of using that Sharpie to scribble "The Guy Behind Me Can't See!" just fall on your marker. This cause needs a martyr.