Sadly, because many of their fans are really confrontational, I would say do it only if you're prepared to be confronted...and not just verbally.
I would do it, because they really thought they accomplished something with their "44-6" and couldn't shut up about it. How many rings do they have again? Shoving their THREE losses in a row in their faces is awesome. I always wear my Cowboys jerseys here in NJ - especially after a Giants loss/Cowboys win. The faces of the dejected fans are priceless.
Having said that, I'd still respect you if you didn't. A mature person would probably say that that it's not worth the risk - and they'd probably be right.
It's sort of like wearing that sign Bruce Willis had to wear in one of those Die Hard movies when he got dropped off in Harlem or somewhere. Kinda asking for trouble.