Would user feedback and star rating be bad?

I recently bought an Ipad and I love it. The store feature that lets me frind free and pay programs is so great. The greatest asset, besides the quality of the software, is the user feedback system. Why couldn't that sort of system be added to Ubuntu Software Center?
I realize that the information submitted would have to have some storage on a server and moderators to stop people with a more than moderate discontent for a software experience from voicing their discontent with obscenities. It could be simplified by only allowing stars and multiple choice answers to basic useful questions. Where that information would be rated in 1 to 10 stars and given as percentages in the feedback. This would allow for the system to run without moderators.
This came up as I installed Ubuntu for the third time and still find the most frustrating part in selecting some other applications to round out my installation.

            Thank you, Ubuntu is the greatest implementation of Linux I have every used. My previous experiences are with Mandrake and Red Hat.