In my opinion, the beauty of Kickstarter is that it's a democratic platform. If you don't think the rewards or the project itself are worth backing, then don't back it. If you do, back it.

It's not as if Kickstarter is this magical service to give celebrities more money: for example, Melissa Joan Hart's Kickstarter is doing pretty poorly (http://www.kickstarter.com/projects/318676760/darcis-walk-of...).