All three cities—Baltimore, San Fran and New Orleans— will be trashed simultaneously, whoever wins or loses.
When the Saints won it's first and only Superbowl the celebrations went on without any major problems. Unlike most city police departments The NOPD is used to large crowds of drunk revelers. They deal with it every year during Mardi Gras. One more thing, police from cities and parishes all over the state come to NOLA during Mardi Gras to help out. This year they came a bit early to help out with the super bowl.
One last thing, don't mess with the cops in New Orleans because they will just thump you without thinking twice. It goes without saying that we had no trouble with the occupy wall street hippies.