Just like being rich shouldn't get anyone a lighter sentence, it also shouldn't be used as a reason to get anyone a stronger one.
I might disagree with this. Celebrities, while not necessarily role models, are highly public figures (obviously) and shape our culture, whether we like it or not. When they commit crimes and get a light sentence, it sends a message to the celebrity-worshiping general public that it's cool to be a criminal.
Robert Downey, Jr, for instance. He goes to jail, and immediately gets a big film role upon his release. Same with Charlie Sheen and all these other "bad boys". It sends the message to young men that you can smack your beech up, do drugs, get hammered all the time, and not only will you make tons of money for doing it, but you'll get all the hot babes as well.
The message it sends you young women is that these are the must-have cool guys - you know, the abusive ones. Because they're like, so hawt.
This ties into that Katy Perry/Sesame Street thing. We're a screwed up society because we worship crazy dysfunctional people and teach our children to do the same. We teach our girls that they are nothing more than a pair of (future) boobs and a potential sex partner for some druggie who'll beat the chit out of them. And we teach our boys that that's what girls are for - sex and smacking.
We've come a long way, baby.
I'd lethally inject Lindsay Lohan just to use her as an example for kids who might think she's all kewl and chit.