Fans Taking It To Too Extremes?

Have you ever had (as a sports fan) times where your favorite team looses and you see other teams celebrating in the near distance? Well, you're not alone. No matter where you go you'll see them. Even at your favorite team's home stadium.
 But, for some reason I question occurrences like this. Say last year your favorite team, the Ravens lost against the Patriots (which actually happened) now I would imagine that Patriots fans celebrated as their team was going on to the Super Bowl. The Patriots didn't care about the Ravens fans and were practically shoving this in their face. Now in 2013, the Ravens defeated the Patriots and went on to the Super Bowl and winning it. It is sort of like the Patriots fans got a taste of their own medicine.
 So the point I'm trying to get at here is that fans shouldn't be bragging about their team when one day they may be in the exact same position as the loosing-team's fans- karma does good.
 So yes, you can be happy about your team winning but don't take it to extreme levels of bragging and violence because karma will come back and haunt you.