Yeah, well, it's pretty typical southern california fans in general, last year people were all about the Chargers, stickers, license plate frames, those annoying window flags etc... This year, they aren't winning so the frame gets put away, replaced with whatever team is hot this year. There's a reason that LA doesn't have a professional football team, there's no bigger group of bandwagon fans than SoCal.
I will admit it's nice being able to get decent Lakers tickets now though :p
My point, they will shut up after a couple bad years. However, this year, the talk is about how much we need a playoff system, ie: USC should be in the championship game every year. Whereas in the past when they have been highly ranked that conversation doesn't take place.
Just like any team/school etc... they have a lot of "true fans" people who have had season tickets for years, and a bunch of drunken bandwagon fans who will jump ship if they start to lose or will sell their tickets if they can make a buck.