I wouldnt wear an opposing jersey to an oakland or detroit home game, but i wouldnt be too worried in most stadiums in the league. Me and a buddy went to the San Fran Seattle game last year, in sanfran, and he is a die hard seattle fan, and he wore the jersey the whole game, i was pissed at him cause i thought it was going to make us outcasts and i paid for most of the trip, but he was humble, didnt cheer much, took a pretty good razzing from the crowd, and didnt rub it in, or fight back, we were friends with everyone around us by the end of the game, and we ended up picking up a couple babes after the game all cause they started mocking his jersey in the end, so it worked out good.
In hindsight though sanfran won the game so i dont know if it would have turned out different if the 49ers would have lost.
Bottom line is dont be a jackass in the other teams barn especially if you win in the playoffs, but some stadiums are simply out of control like detroit or oakland.
Btw AAA, being that you are a washington fan, what do you think the over/under is on the number of segments tomorrow night that trash the redskins name? Im saying atleast half a dozen.