Interesting. I actually attended the game with a friend from Ireland (his first SU game, first major American sporting event) who was in town visiting his in-laws and, upon noticing that there were two Nova fans seated behind us, asked (tongue-in-cheek) if we would be expected to brawl with them (one was a teenager and the other a portly middle-aged man), and then told me of several fan brawls he had personally witnessed at various football matches, caused by nothing more than wearing opponent colors.
I assured him that, as long as they stayed civil, the Dome faithful would as well, and that's exactly what happened. I've never personally witnessed any fan of an opposing team get harassed at the Dome aside from some good-natured ribbing (anyone else remember the ND fan in the chair foul-shot challenge a few years back? I don't know if I've ever heard louder boos at the Dome. But, to be fair, that guy was eating it up, WWF-villain style).
My guess is if this guy was getting yelled at, it was either a) deserved, or b) fueled by alcohol, and if you go into another team's home wearing visitor colors, you get what you get.
But I hope NickelDimer's bleeding fingers heal soon. Maybe if he posted more quality/less quantity it wouldn't happen. Just sayin'.