1 Duke rushed against unranked Virginia Tech in 2005.
Kansas hasn't rushed a home game since the late 70s, but they rushed an empty court at Phog after the 2008 championship and they rushed a neutral court in Las Vegas against #1 Florida in 2006 while ranked #12.
13 UNC rushed against #4 Duke last year.
Unranked UConn rushed against #1 Texas in 2010.
As for the "above rushing the court schools" you didn't mention:
Unranked Indiana against #1 Kentucky this year.
Unranked UCLA against unranked Washington in 2010.
Unranked Michigan State against #1 Wisconsin in 2007.
Unranked Syracuse against #9 Georgetown.
Kentucky is the only blue blood without a recent full-fledged court storm. Of course, they're also the only one on the list that doesn't have significant student seating anywhere near the floor. (imagine the blue hairs using their canes and walkers to rush) But even that didn't stop a few students from rushing when they beat Vanderbilt in 2008.
There aren't schools that don't rush the court. Some do it less than others, but every blue blood or near blue blood program had rushed (or partially rushed) in the last decade. The elitist mentality isn't rooted in any sort of fact.
They're 18-22 and usually drunk. They're excited. Nobody gets hurt (and arena security is always there to protect the opposing team). Be happy you rushed. It means you got a huge win and that your students actually care.