I thought the same thing as you did Avi, about the Jimmy Saville situation, before what had happened came out.
The thing is, that celebrity story had implications for the BBC, several hospitals and the child protection services of several local authorities. These aren't minor issues, and aren't something I'd like to have forgotten about because the guy who did it was a celebrity. Indeed, that very fame protected his activities until after his death, and meant he got away with things he should have been arrested for. While some celebrity stories are admittedly dross, (I'm thinking what celeb A said to celeb B) some stories are about serious crimes that should be publicised because they're a reflection on how power can be abused by people who sometimes have the most trust among society. I understand sensationalist bias, but I don't think that abuse cases should be ignored because it's a criminal allegation or because a celebrity is involved.
I guess a good test is: is this story important only because a celeb is involved, if it's not, then there's probably something to look at there.