You know, there are way, way, way more people that DO care about their score than the cool kids that don't.
Also, points ARE worth something if you participated in the challenges at 360 Voice.com. They are running out of prizes now, but for the past several months you could turn your GamerScore whoring into gift cards and MS point cards.
And I don't know why some people apparently don't understand why this is a good thing. Cheaters and liars getting their comeuppance is a simple pleasure for all of us honest people to enjoy. You might not care about your GS, but the people getting caught obviously did, and their tears today are sweet like candy.