The source you provided does not support the assertion that "USC kids are spoiled, snotty snobs."  The article merely instructs the reader to "hate the Trojans," and gives a reason that they are spoiled and snotty.  Again, if you find evidence that USC students are snobs, (i.e. a published study that measure students on a validated scale of "snottiness"), that would be admissable as a verifiable fact.  The only thing you could do with the article you provided would be to say that "The Daily Bruin has accused USC students of being 'spoiled, snotty snobs'," perhaps as part of an discussion about USC vs. UCLA rivalry.  Your example is no-parallel.  On the other hand, Riverside and the 909 is definitely associated with trailer trash, cows, and hicks - there is no question about it.  If it is true, and verifiable, I don't see how you can object to its inclusion.