I think LSE students should care though. I mean when you fill in the survey you are about to leave the school so therefore any changes in teaching as a result of the survey will not affect you.
Do not forget, you go to one of the worlds top universities and i for one would want my choice to be vindicated by a ranking however stupid they are, esp when i personally could change it.
Afterall, loads of school leavers who have bever heard of the LSE (Like i never had) may not apply there if it likely goes out of the top 10 because they take rankings so seriously and see it as hard to get into. Afterall, who wants to apply to a school ranked 12th but harder to get into and less social and fun than one ranked 5th with great satisfaction. And research has shown this is true.