A word of advice for fans of other teams that travel. You MAY not want to act like a dick at the start of the game, as the home crowd will not let you forget it during the game.
STL was full of Dallas fans (full of Romo and TO jerseys) that spent the pregame running around yelling "how bout dem cowboys!" and "this is like a home game for us". Then during the first fiveminutes of the game, jumping up and over-celebrating even a two yard run by their running back. Just over- cheering to let the STL crowd know how superior they were.
Below is a picture of two guys in front of me who were the WORST of the lot. I could make fun of the fact that they were grown men with stars painted on this face, but I won't go there.
Here is how the gentlemen looked during the game from 5 minutes in until the end. They looked like wax dummies.

To think what they paid to fly all that way only to be thoroughly splattered. At least they got what was coming to them. I don't expect any home team crowd would be kind to the losing side after an upset of such magnitude.
It's amazing just how many people can be heard 'round here spouting "Wade Phillips is out. He's gone." It's only a matter of time.
And I wouldn't get so cocky about spurning rabid fans for being over-zealous at the beginning of the game... Doesn't matter what team you root for, they can still fuck up royal, as any Patriots fan can tell you.